/glas"wair', glahs"-/, n.
articles of glass, esp. drinking glasses.
[1705-15; GLASS + WARE1]

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      any decorative article made of glass, often designed for everyday use. From very early times glass has been used for various kinds of vessels, and in all countries where the industry has been developed glass has been produced in a great variety of forms and kinds of decoration, much of it of great beauty. For the composition and properties of glass and the manufacture of various glass products such as glass containers, window glass, plate glass, optical glass, and glass fibres, see industrial glass (industrial ceramics).

Antiquity and the Middle Ages

Early glass
 It is not certain in which of the civilizations of the ancient Near East glass was first made. The earliest wholly glass objects from Egypt (art and architecture, Egyptian) are beads dating from some time after c. 2500 BC. A green glass rod found at Eshnunna in Babylonia may go back earlier, possibly to 2600 BC. A small piece of blue glass found at Eridu dates from before 2200 BC. The manufacture of glass vessels, which may have begun slightly earlier in Mesopotamia (art and architecture, Mesopotamian), was carried to a high point of excellence in Egypt during the 18th dynasty (c. 1490 onwards). These vessels are distinguished by a peculiar technique: the shape required was first formed of clay (probably mixed with dung) fixed to a metal rod. On this core the body of the vessel was built up, usually of opaque blue glass, on which, in turn, were coiled threads of glass of contrasting colour. The threads were pulled alternately up and down by a comb-like instrument to form feather, zigzag, or arcade patterns (see photograph—>). The threads—usually yellow, white, or green in colour, and sometimes sealing-wax red—were rolled in (marvered) flush with the surface of the vessel. Finally, if desired, handles—often of translucent glass and sometimes of patterned “canes”—were added. The vessels were nearly always small, mainly for unguents and the like. Occasionally glass was decorated on the lapidary's wheel. Glass is known to have been made on the palace site of Tell el-Amarna, the residence of Akhenaton (reigned c. 1379–62 BC), and the number of fragments found in and near the palace of Amenhotep III (reigned c. 1417–1379 BC) at Thebes suggests that it was made there also. This palace activity seems then to have died down and after the 21st dynasty (1085–945 BC) to have ceased altogether.

      In Mesopotamia the Nineveh tablets of the reign of Ashurbanipal (668–c. 626 BC) and the remains of glass in various forms excavated at Nimrūd (ancient Calah, Assyria) indicate that glassmaking was carried on there during the 8th to the 6th centuries BC. It is probable that certain vessels of palish-green or deep blue glass, cut from a solid mass as if from stone, are Mesopotamian and date from as early as the 8th century BC, as a dish from controlled excavations in Phrygia proves. A vase of this type, contrasting completely with the core-wound glass of Egypt, bears the cartouche (panel enclosing the name) of the Assyrian king Sargon II (reigned 721–705 BC), and it is probable that glass treated in this way was manufactured over a long period in Mesopotamia.

      Glass was made in Greece in Mycenaean times (c. 1400–1200 BC) usually in the form of small molded architectural details. A few pieces suggest, however, that perhaps some vessel glass also was made by the Egyptian technique, though not in Egyptian forms. Other Aegean-area glass of this period may have been imported from Egypt.

      In general, glass of the earlier half of the 1st millennium BC is scarce and displays little homogeneity. From the 6th century BC, however, glass begins to appear in great quantities once again, particularly on the Greek-inhabited islands of the Aegean, in Greece itself, in Italy and Sicily, and even farther west. This contrasts with the meagre contemporary finds on Egyptian soil. The later glasses in the old Egyptian core-wound technique were probably made in Syria or some part of the Greek world. Such vessels were still small but differ in shape from the earlier Egyptian dynastic work. They were usually decorated with light-coloured threads on a dark, usually blue, ground (familiar from the Egyptian 18th dynasty), but a notable variation was displayed in pieces decorated with dark purple threads on a white ground. In the Hellenistic (Hellenistic Age) period (roughly from the 4th century BC) the shapes of glass degenerated. The technique of decoration, however, remained the same; new colour combinations were used, and indeed these combinations continued into the era of blown glass.

The Roman Empire (ancient Rome)
      In Egypt during the Ptolemaic period (330–305 BC) Alexandria came to the fore in glassmaking. By about the 1st century BC, which saw the beginnings of glass as known today, it had become preeminent in certain glass techniques. Alexandria inherited and perfected the manipulation of coloured glass rods to make composite canes, which, when cut across, revealed a design (mosaic glass). Slices from such canes could be arranged side by side to produce repetitive patterns. When, as often happens, the cane slices show starry or flowerlike designs, the resultant glass is called millefiori (“thousand flowers”). An Alexandrian technical speciality more important for the future, however, was molding (mold), glass being pressed into, or powdered glass melted in, a mold. A combination of this process with the millefiori (millefiori glass) technique produced bowls with variegated designs in infinite variety. Sometimes glass of various colours was irregularly compounded to give the effect of a natural veined stone; occasionally enclosures of gold leaf in the glass simulated the glitter of natural pyrites (aventurine glass). Bowls were often finished around the rim with a cordon made of a clear glass thread twisted with one of opaque white. Sometimes such cable threads were themselves coiled round and round from a centre to make a bowl of lacy appearance, with the opaque white glass threads apparently set in a clear colourless matrix.

      All these pieces might be finished with a fire polish by returning them to the furnace, but many mold-pressed glasses were, in fact, given a rotary polish, either by means of a spinning wheel fed with abrasives or by a process similar to lathe turning, in which the object spins and the tool is stationary. Similar equipment probably produced the numerous pieces that give every appearance of having been cut (cut glass) from a solid block of glass or at least from a thick, mold-pressed blank. Such pieces (usually flat dishes or two-handled cups) follow the contemporary forms of pottery and metalwork. Wheel engraving (engraved glass) appears to have become an Alexandrian specialty around the 1st century BC and probably continued so throughout the two succeeding centuries. Alexandrian wheel engravers produced not only massive cut shapes, but also intaglio (incised) and relief surface decoration, the latter by laboriously grinding back the surface of the glass to form a background for the design. Simple motifs such as lotus buds or lotus flowers were produced in this way and occasionally more elaborate figural compositions were also done. Other specialties attributed to Alexandria were enamel painting (pigments mixed with a glassy flux were fused to the surface of the glass vessel by a separate firing) and an extraordinary technique of sandwiching a gold leaf etched with a design between two layers of clear glass.

      The most important innovation in the whole history of glass manufacture was blowing (glassblowing). Perhaps by a stroke of pure inventive genius it was perceived that glass on the end of a hollow metal tube could be blown into a mold as easily as it had theretofore been pressed in. The next stage was to use molds for forms, such as flasks, that could not be made by pressing. Finally, it was realized that the glass bulb on the end of the blowpipe could be shaped freehand to any form desired, and handles, feet, and decorative elements could be added at will. This liberating discovery, probably made during the 1st century BC, gave rise to the astonishing growth of the glass industry in Roman imperial times. In addition to the luxury vessels of types already described, which were produced with an elaboration of skill that astonishes and often baffles the modern technician, commercial containers in great variety were mass-produced in common greenish glass on a scale that was not matched until the 19th century.

      The discovery of glass blowing may well be credited to the Syrian glassworkers, since the first mold-blown glasses bear the signatures of Syrian masters and since the readily ductile Syrian soda glass was especially apt for this purpose. Syrian glassworkers, however, seem to have migrated wherever demand promised a ready market, and some masters of mold blowing appear to have moved to Italy early in the 1st century AD; in the course of that century Italy became an important glass-producing area. Glass engraving especially seems to have flourished there and particularly one form of the art—grinding through an opaque white layer to a darker ground ( cameo glass). The most famous example of this exacting technique is the Portland vase, in the British Museum, London. The capacity of the Italian glass craftsman to surpass all earlier masters in work of the most complex character is seen in the so-called cage cups (diatreta), on which the design—usually a mesh of circles that touch one another, with or without a convivial inscription—is so undercut that it stands completely free of the body of the vessel, except for an occasional supporting strut. These cups were made perhaps at Aquileia and date from the 3rd and 4th centuries.

      Parallel to the pottery industry, glassmaking spread from Italy to northern Gaul, in particular to the valleys of the Rhône and the Rhine. In Britain the industry was probably not of great importance. The Rhineland, however, became one of the great glassmaking areas of the Roman world (partly, it is thought, because of successive migrations of Near Eastern workers) and, although Rhenish glass is always recognizably Roman, several types of decorated glass were specialities of the district. Glasses decorated in serpentine patterns by threads trailed on and then pressed flat and notched are perhaps the most important and typical (Schlangenfadengläser). A considerable school of glass engraving also seems to have flourished, probably around Cologne. Although some engraving shows an impoverished linear style eked out by lines scratched with a hard stone point, some is executed by means of wheels sufficiently thick to permit rounded cuts corresponding to the modelling of the human figure, and simulating it when the piece is seen against the light. Both types of decoration flourished in the 3rd and 4th centuries.

      In Egypt in the later centuries of the Roman epoch glass was in frequent use for tableware, but artistic standards were not high. Plain dishes, cups, bowls, and lamps are characteristic; the glass of such tablewares ranges from an almost colourless “metal” (basic glass) of good quality to a greenish brownish substance full of bubbles and impurities. Decoration in this late period is mainly restricted to a few rough-cut lines, an occasional group of coloured glass blobs on the lamps, or a zigzag trail of glass thread running between the lip and the shoulder of a vase. In Syria during the same period, however, this trailing technique, which was particularly suitable to the ductile Syrian material, was carried to extreme lengths—threads circling the body or neck of a vessel, a profusion of zigzags, and fantastically worked handles.

      With the breakdown of the Roman Empire, glassmaking fared differently in different parts of the world. In the East, urban life continued relatively undisturbed, and glassmaking evolved in an unbroken progress into Islāmic times. In the northern provinces, however, glassmaking became an affair of small, often isolated, glasshouses working in the forests that supplied them with fuel. Relatively simple shapes were made of an impure greenish or yellowish material, and decoration was restricted to simple trails of thread. Considerable virtuosity, however, was displayed from c. 500 onward in the manufacture of the elaborate and fantastic Rüsselbecher (“elephant's trunk, or claw beaker”) on which two superimposed rows of hollow, trunklike protrusions curve down to rejoin the wall of the vessel above a small button foot.

      In the East, Syria appears to have continued its predilection for trailed and applied ornamentation. In Egypt the art of glass suffered a catastrophic decline; only small rough vessels of impure green or blue material were manufactured.

      In Byzantium itself the position of glassmaking is obscure. A distinction was made between vitrarii (“glassmakers”) and diatretarii (“glass cutters”) in edicts of Constantine the Great, Theodosius, and Justinian—suggesting that cutting played an important part in Byzantine (Byzantine art) glass decoration. This is borne out by the fact that cut glass made up the greater part of the glass that was brought back from the sack of Constantinople by the crusaders and placed in the treasury of St. Mark's in Venice. Apart from a few pieces of obviously Roman glass, presumably kept as heirlooms in Byzantium, these glasses are decorated either with tessellated (mosaic) patterns of overlapping round or oval facets or with round bosses in relief. These same two forms of cutting are observable in glass of the 5th century excavated at Kish in Mesopotamia; it is a fair assumption that Byzantine taste in glass, as in some of the other arts, was strongly influenced by the East. It is probable, however, that some enamelled and gilt glass also was made in the Byzantine provinces (e.g., in Corinth), if not in Byzantium itself.

      In the 7th century the whole Near East was overrun by the Arabs, and a number of rival dynasties were established in different parts of the conquered territory. An Islāmic civilization developed comparable to the preceding area of Greco-Roman culture, and a distinctively Islāmic (Islamic arts) glass style evolved. Although often it is not possible to say where a particular glass was made, different parts of the Islāmic world seem to have shown predilections for one or another type of glassmaking. In Syria, pieces more or less heavily decorated with trailed threads or applied blobs and pieces blown in molds, patterned with ribs or other allover designs, were still made. In Mesopotamia (art and architecture, Mesopotamian), glassmaking and, in particular, engraving flourished, especially during the Abbāsid Dynastyʿ (750–1258), and attracted many of the best artists in the Islāmic world. Not only were the earlier modes of facet and boss cutting continued, but (perhaps deriving from them) two splendid new styles were created, one of linear intaglio, the other of relief cutting (outlines were left in relief by cutting back the ground and were then enlivened by crosshatching). Bowls, bottles, and ewers of remarkable sumptuousness were decorated with forms of running animals and plant scrolls. The quantity of engraved glass of these types found in Persia suggests that such work was done there also.

      In Egypt there was both innovation and, after the post-Roman period, a notable revival of earlier techniques. Among the innovations was the stamping of glass by means of tongs, one jaw of which was patterned. The technique also is found in other lands. One extension of it, by which a bottle's upper and lower halves, made separately in contrasting colours, were decorated by the tongs and then joined together, was probably a Syrian innovation. More important was the Egyptian invention of lustre painting (lustred glass). In its simplest form it consisted of painting with a pigment containing silver that when fired in a smoky atmosphere (i.e., without oxygen) produced on the glass a thin, metallic film that varied in colour from pale yellow to brown. Intact bowls and a bottle decorated by this technique exist, but whole classes of much more elaborate lustre-painted glass are represented only by fragments. A very wide variety of sumptuous polychrome effects are represented, although many were probably not produced by lustre properly so-called. The technical processes by which these effects were achieved are not yet understood.

      Egyptian Islāmic revivals in glass included millefiori effects, found mainly in plaques for wall decoration, and white fern and feather patterns that were produced on dark glass vessels by combed and imbedded glass threads. Glass cutting was also practiced in Egypt, primarily for the production of deeply incised small perfume bottles of square sections, the bases of which were often cut into four tapering feet (“molar tooth” bottles). It seems probable that in Egypt was also perfected the techniques of gilding, decisive for the next phase in Islāmic glassmaking. In gilding, gold leaf is applied to an object that is then fired to fix the glass.

      Glassworkers migrating from Egypt to Syria after the fall of the Egyptian Fāṭmid dynasty in 1171 may have laid the foundation of the Syrian art of enamelled and gilt glass. Although earlier phases of this art are incompletely understood, the first group of enamelled and gilt glasses seems to be one in which thick enamels are used (particularly white and turquoise blue), often in series of beadlike drops; this group is tentatively associated with the town of Raqqah in Syria. A similar doubt surrounds the origins of two broad families into which Syrian glass of the 13th century is divided. One, characterized by the use of thick, jewellike enamels, is connected with the town of Aleppo; the other, notable for its exquisitely painted small-scale figural decoration, is attributed to Damascus.

      Both cities were famous for their glass at this time, but it is uncertain what each produced. Wherever made, these two types of glass represent one of the highlights in the history of the art, whether one considers the rich green, red, yellow, white, and turquoise-blue enamels of the “Aleppo” group or the masterly red outline drawing of the “Damascus” group.

      Toward 1300, Chinese influence, infiltrating by way of the Mongols and Tatars, makes itself felt in the decoration of these glasses, as is apparent in the series of great mosque lamps that then began to be inscribed with the names of rulers and great officers of state in Egypt. From a peak of excellence at the beginning of the 14th century a decline set in, greatly precipitated by the Mongol conqueror Timur's sacking of the chief Syrian cities at the end of the century.

      Damascus fell finally in 1400, and it is recorded that the glassworkers of that city were carried into captivity in Samarkand. Nevertheless, some enamelled glass of inferior quality continued to be made in the 15th century, perhaps in Egypt (art and architecture, Egyptian). By the end of that century, however, there is evidence that mosque lamps were being made in Venice for the oriental market and the great Near Eastern tradition of enamelled and gilt glass was clearly moribund.

Mid-15th to mid-19th century

Venice and the façon de Venise (Venetian glass)
 A glass industry was already established near (Italy) Venice in the 7th century, and vessel glass was made there by the last quarter of the 10th century. In 1291 the glass furnaces were removed to the neighbouring island of Murano to remove the risk of fire from the city. Although Venice had constant contact with the East, there is no evidence that it was indebted to that source for its skill in glassmaking. Venetian enamelled glasses (see photograph—>) appear in the second half of the 15th century, and, although their technique is essentially similar to that of the Syrian glassmakers, it is likely that they are of independent development. Little is known of the vessels made before this period, but it is evident from representations in pictures that they were mainly footed flasks and low beakers. The Venetians attributed the introduction of enamelling to a member of the glassmaking family of Barovier. The earliest pieces known, commencing with a goblet dated to 1465, certainly show no signs of outside influence. These, like most Venetian glass of the period, were inspired by the artistic ideals of the Italian Renaissance. The decorations represent triumphs, allegories of love, grotesques (fanciful combinations of human and animal forms), and so forth, with borders of dots of enamel laid on a ground of gold etched in scale pattern. Many of these pieces were of richly coloured glass, blue, green, or purple.

      The Venetians were keenly aware of Roman achievements in glassmaking as in the other arts; they reproduced mosaic, millefiori, and aventurine glass, and glass resembling natural layered stones (calcedonio, sometimes miscalled Schmelzglas), and they even copied a Roman form of bowl that had vertical, external ribs. All these types of glass were Venetian specialities, and they were probably developed as a part of the extensive local bead industry.

 The greatest achievement of Venice, however, and that upon which its great export trade came to be based, was the manufacture of clear, colourless glass, which was apparently exclusive to Italy during the Middle Ages (see photograph—>). From its resemblance to natural crystal, this material was called cristallo, although in fact it often has a not unpleasing brownish or grayish cast. Made with soda, it was very ductile and cooled quickly. It therefore demanded of the workmen great speed and dexterity, and this, in turn, affected the nature of the glasses made. In the first half of the 16th century the Venetian glassblowers produced glasses of an austere simplicity. As the century proceeded (and more markedly still in the 17th century), however, there was a tendency to produce elaborate and fantastic forms. Enamelling on glass went out of fashion in Venice (except on pieces for export) in the first half of the 16th century. Its place was taken to some extent by the use of opaque white glass threads for decorative purposes (latticinio). This form of decoration became progressively more complex; opaque threads were embedded in a matrix of clear glass and then twisted into cables, which were themselves used to build up the wall of a vessel. The height of complexity was reached when a bulb of glass decorated with cables or threads running obliquely in one direction was blown inside a second bulb with threads twisted in the other direction. The composite globe thus formed was then worked into the desired form. This resulted in a vessel completely covered with a lacy white pattern (vetro di trina). Other methods of decoration at this time were mold blowing and dipping a vessel while hot into water or rolling it on a bed of glass fragments to produce a crackled surface (ice glass). Cristallo was also found suitable for engraving with a diamond point, a technique which produced spidery opaque lines that were especially suitable for delicate designs. The technique seems to have come into use about 1530.

      The glassworkers of the island of Murano were forbidden to leave Venice or to teach their secrets to outsiders, under dire penalties both to themselves and their families. Such was the demand for Venetian glass in the rest of Europe, however, and such was the desire of kings and nobles to control and reap the profits of its manufacture, that many Venetian workmen in the course of the 16th century were tempted to abscond to other countries, where they helped to set up glassworks. Furthermore, at Altare (Altare glass), near Genoa, existed a second great centre of glassmaking. Its glass was so like the Venetian in style and material that it is nowadays impossible to distinguish between the two. The glassworkers at Altare, moreover, were governed by no such laws as the Venetians; rather, they made it their policy to supply their men and teach their methods wherever there was a demand. Thus, the fugitive Venetians and the willing Altarists spread the Italian art of glass to the rest of Europe, and glasshouses were established in France, Spain, Portugal, Austria, and Germany, while in the North, Antwerp was a secondary source of diffusion.

      Italian glassworkers ranged as far north as England, Denmark, and Sweden. Their labour was necessarily diluted by that of native workmen to whom they were often required to teach their methods. Variations in locally available raw materials modified the quality of the glass, and local taste influenced the form and ornamentation of the objects they produced. Nevertheless, in the late 16th and the 17th centuries an international style in glass developed, wholly Italian in origin and inspiration (façon de Venise).

      Although there was everywhere a family likeness among glasses of the façon de Venise, certain countries developed types peculiar to themselves that are worthy of mention. Thus in Spain not only were fantastic and even bizarre shapes evolved in green glass, but in Barcelona a characteristic kind of enamelled decoration was developed, the peculiarities of which include a light-leaf-green colour and a constantly recurring lily-of-the-valley motif (late 15th–16th century). Elsewhere, at Hall (Solbad Hall), in the Tirol, a characteristic decoration with the diamond point, often supplemented by cold painting (i.e., unfired oil—or other paint applied to a finished object), was favoured in alternating broad and narrow upright panels containing symmetrical scrollwork or coats of arms and other devices. Almost equally stiff and formal diamond-point work is to be seen on glasses probably made at the London glasshouse of Jacopo Verzelini (examples dated between 1577 and 1590). A more promising development of diamond-point engraving occurred in the Netherlands (Netherlands, The). There too the work of the 16th century was relatively formal and stiff, linear and clear, with simple hatching only. In the succeeding century, however, diamond-point engraving became initially more supple and pleasing, only to degenerate eventually into over-elaboration.

      Diamond-point engraving was practiced there widely by talented amateurs in the 17th century, among them Humanists such as Maria Tesselschade Roemers Visscher, her even more famous sister Anna Roemers Visscher (Visscher, Anna) and Anna Maria van Schurman. The latter two decorated their glasses with flowers and insects drawn with a gossamer touch, often accompanied by epigrams in Latin or Greek capitals scratched with severe precision or in the free scrolled style of the Italianate writing masters of the time. A similar calligraphy was practiced later in the century by the amateur Willem Jacobsz van Heemskerk, with notably beautiful results.

      Engraving in the first half of the 17th century gradually abandoned linear clarity in favour of crosshatched chiaroscuro (shading) effects, the highlights formed by sometimes completely opaque spots. Many artists worked in this manner; two are worthy of special mention. One was an accomplished engraver signing “C.J.M.,” whose earliest dated glass is of 1644; the other was Willem Mooleyser, of Rotterdam, who worked in the last two decades of the 17th century with a scribbled freedom and vigour that raised his work above the average. By the end of the century this type of diamond-point work was superseded in popularity by wheel engraving.

      In Germany toward the end of the 17th century a reaction to Venetian glass styles seems to have set in. In that country there had been a continuous survival, probably from late Roman times, of a local type of green glass, a product of forest glasshouses made with potash obtained by burning forest vegetation and called therefore Waldglas (“forest glass”). From this material, often of great beauty of colour, were made shapes peculiar to Germany, notably a cylindrical beer glass studded with projecting bosses, or prunts (Krautstrunk, or “cabbage stalk”), and a wineglass ( Römer) with cup-shaped or ovoid bowl set on a similarly prunted hollow stem. This became the classic German shape of wineglass, which survived into the 18th century and, with modifications, to the present day. Apart from these indigenous forms, German glass in Venetian-type cristallo developed local characteristics of its own in the latter part of the 17th century.

      In Nürnberg, for instance, the tall-stemmed Italianate goblet underwent a transformation into a severe glass with stem composed of no more than a baluster-shaped element and a bulb, which were joined together by a number of disk-shaped elements, or mereses, and attached to foot and bowl by the same means. Such goblets display some of the most accomplished glass engraving that has ever been practiced.

      The leader and founder of the Nürnberg school of engravers was Georg Schwanhardt, a pupil of Caspar Lehmann. Lehmann had been gem cutter to the emperor Rudolf II in Prague and there had taken the decisive step of transferring the art of engraving from precious stones to glass. His first dated work is a beaker of 1605; in 1609 he obtained an exclusive privilege for engraving glass. Although he is the first great personality in glass engraving, he was not the first to practice the art in the German area. On Lehmann's death in 1622 Schwanhardt inherited his patent and moved to his own native city, Nürnberg, where a whole school of glass engraving grew up around him and his family. Schwanhardt's work is characterized by delicate, tiny landscapes, often accompanied by bold formal scrollwork. His son Heinrich excelled in minute landscapes but also engraved inscriptions of fine calligraphic quality. Other notable Nürnberg engravers of the late 17th century were Paulus Eder; Hermann Schwinger, a master calligrapher; and H.W. Schmidt and G.F. Killinger, both notable for the delicacy with which they rendered landscapes. Somewhat similar work was done at Frankfurt am Main by members of the Hess family.

      In Bohemia, after Lehmann's death, little engraving of high quality was done. Just before 1700, however, with the perfection of a massive, crystal-clear, potash-lime glass that allowed cuts of considerable depth, the engravers of the Bohemian–Silesian area came into prominence. The harnessing of the mountain streams in the Riesengebirge for water power enabled engravers (those of the Hirschberger Valley in particular) to practice relief engraving, which demands immense energy for grinding down the background of the design. Massive covered goblets were decorated with powerful acanthus scrolls in the contemporary baroque taste. Relief engraving (Hochschnitt) was only occasionally used by itself in the Bohemian–Silesian area in the 18th century; more often it was employed in conjunction with intaglio (Tiefschnitt). By the turn of the 18th century the engravers of this area—anonymous workmen regarded as artisans rather than as artists—had acquired great technical skill; this enabled them to adapt to glass all the changing fashions of the 18th century in the decorative arts. Glass engraving, often of fine quality, was also practiced in many parts of Germany—notably Thuringia, Saxony, and Brunswick—but the most significant work of the late 17th and early 18th centuries was that done in Brandenburg. There, the glassworks at Potsdam (moved to Zechlin in 1736) produced massive goblets and beakers that were engraved—usually to order for the court—in Berlin, where a water-powered engraving shop had been installed in 1687. Both relief and intaglio engraving were practiced, the latter being favoured. This workshop, indeed, produced perhaps the greatest of the German intaglio engravers, Gottfried Spiller, whose deep cutting on the thick Potsdam glass has seldom, if ever, been surpassed. A notable, if lesser, engraver from the same shop was Heinrich Jäger; and later, in the 1730s and 1740s, work of high quality was done by Elias Rosbach.

      Another workshop of great significance was established toward the end of the 17th century at Kassel, in Hesse. There perhaps the greatest of all the relief engravers, Franz Gondelach, handled glass with a truly sculptural feeling.

      In the second half of the 18th century, engraved glass declined in favour, although the technical skill required for its production never died out in the Bohemian–Silesian area. It experienced a great revival in the second quarter of the 19th century, when the taste of the newly prosperous bourgeoisie favoured elaborate decoration. The engraving of this period is often skillful in the extreme, although marred by excessive naturalism. Striking innovations of the period were the use of a casing (normally ruby red, blue, or opaque white) through which the design was cut down to the colourless glass. A yellow coating (the silver stain of the stained-glass artist) was often used in the same way. Notable engravers of this epoch were Dominik Bimann, August Böhm, A.H. Pfeiffer, and members of the Pelikan and Simm families.

      Second in importance only to engraving as a method of decorating glass in Germany was enamelling. Germany had proved a profitable market for enamelled Venetian glass during the 16th century, and, in the latter part of that century, glass enamelling began to be practiced in the Germanic lands themselves, most notably in Bohemia. This enamelling, in bright opaque colours, was much favoured throughout the 17th century, chiefly on the cylindrical drinking glasses, often of great size, known as Humpen (Humpen glass). The glass they were made of was often impure and of a greenish or yellowish cast, while the painting itself was the simplified repetitive work of artisans rather than of original artists. Nonetheless, the gaiety of colour of these glasses and a certain naïveté in their painting give them an authentic unsophisticated charm. The most favoured types of decoration include a representation of the imperial double-headed eagle (Reichsadlerhumpen); representations of the emperor with his seven electors, either seated or mounted on horseback (Kurfürstenhumpen); subjects from the Old and New Testaments; and allegorical themes such as the Eight Virtues and the Ages of Man. These were painted between borders of multicoloured or white dots or intersecting ellipses, often on a gold ground. This general style continued into the 18th century; but in the course of that century the levels of artistic and technical competence sank, and the tumblers and spirit bottles, which were the main types produced, can be regarded only as objects of peasant art.

      A far more sophisticated type of enamel painting was carried on during the third quarter of the 17th century at Nürnberg. There, painting in black or sepia (Schwarzlotmalerei)—a technique borrowed from the stained-glass artist—was used to decorate the small cylindrical beakers (often resting on three hollow ball feet), which were a locally favoured shape. Other colours, notably red used in touches with the black, were occasionally employed. The greatest and most original artist of this school was Johann Schaper, who painted delicate architectural and landscape compositions in which a fine point was used to etch in details. The best of Schaper's followers were J.L. Faber, Hermann Bencherlt, Johann Keyll, and Abraham Helmhack, but none of them equalled him in artistic competence. Comparable work appears to have been done, although on a more restricted scale, in the Rhineland, notably by Johann Anton Carli of Andernach. At the beginning of the 18th century Schwarzlot painting, often with touches of gold, was practiced in Bohemia and Silesia and reflected the changing fashions in the decorative arts. Daniel Preissler and his son Ignaz are known to have done this work.

      In the first half of the 19th century the decorators of vessel glass once again borrowed from the stained-glass artist. Samuel Mohn, his son Gottlob Samuel Mohn, and Anton Kothgasser painted the beakers typical of this “Biedermeier” period in transparent enamels and yellow stain.

      A technique peculiar to Bohemia in the 18th century was that of the “gold sandwich glasses” ( Zwischengoldgläser). These were beakers or less often goblets made of two layers of glass, exactly fitting one over the other, between which was sandwiched a gold leaf previously etched with a steel point to the desired design. The earliest work in this technique was anonymous, but late in the century J.J. Mildner employed it with notable success, making gift tumblers decorated with medallions of etched gold or silver leaf (often backed with red pigment) and sometimes also engraved on the wheel or with the diamond point.

      Glass was certainly made in England during the later Middle Ages, but most of it was used for church windows (see stained glass). The vessel glass of the period has not been much studied and is only imperfectly understood. Only by the second half of the 16th century does the picture become clearer. Two lines of development may be traced in this period. One is the glass of German waldglas type, made in the woods that supplied the furnaces with fuel and a source of potash. These glasses were made by workers whose traditions were those of Lorraine and northern France. Much of their production was of window glass, but they also made vessels in a modest variety of shapes and modes of decoration. Chief among them was a tumbler-like drinking glass with a low, double foot-rim produced by pushing in the bottom of the bulb from which the glass was made; this might be decorated either by mold-blown diaper (overall repeat) patterns, by swirled ribbing imparted by mold blowing and subsequent twisting, or by a zone of trailed threading below the rim. Applied notched ribbons or small circular motifs also were used. Small bottles of mold-blown hexagonal section or of flattened ovate form with diagonal ribbing also were made. The second line of development was that of the international Venetian style brought by immigrant Italians; this, however, in time acquired an English idiom. The work was done mainly in London.

      In the 17th century these two traditions were welded into one, spurred by the proclamation of 1615 that forbade the use of wood in glass furnaces, as well as in certain other industries, in an effort to prevent the deforestation of the country. Thereafter, with coal as the sole means of fusing glass, glassworks tended to be located where coal deposits (and the frequently concomitant fire clays for making glass pots) were abundant. Since such areas for the most part were those that have been continuously occupied by industry (e.g., the Stourbridge area and Tyneside), exploration of the early glass factory sites has seldom been practicable. Little, therefore, is known of provincial glassmaking in England in the 17th century, but it is clear that Venetian influences gradually replaced the earlier waldglas tradition, which had depended on supplies of wood. Some idea of the new style may be gained from the fragments of glasses often excavated in London and other cities. It is frequently difficult to distinguish between an English glass and an imported European one, although a certain coarseness may be taken as symptomatic of English make.

      During the first half of the 17th century, glassmaking was among the English industries for which monopoly rights were granted by the crown; the greatest of a series of monopoly holders was Sir Robert Mansell, who effectively controlled the industry from 1623 until his death in 1656. After the Restoration, although some monopolies were granted for certain categories of glasswares, an increasingly important role in the English industry was played by the Worshipful Company of Glass Sellers (reincorporated in 1664), which was able to keep closely in touch with the needs of the English market. Its members seem to have laid stress on simplicity of shape and durability of material, as appears from the correspondence of one of them, John Greene, with his suppliers in Venice. Dissatisfied with the quality of glass supplied to them and no doubt also anxious to make England independent of foreign sources of both finished glass and raw materials, they commissioned George Ravenscroft (Ravenscroft, George) to make experiments with native materials in the hope of evolving a more solid glass than the Venetian and one that more closely resembled rock crystal (flint glass).

      Ravenscroft was completely successful; his crucial discovery was the value of adding lead oxide. His “glass of lead,” evolved about 1675, was perfected toward the end of the century and set a standard for the rest of Europe. It was solid and heavy and more durable than the Venetian-type glass, which it progressively displaced. It was also characterized by brilliance and dark shadow paradoxically combined. It was slower to work than the Venetian glass and gradually the Venetian idioms were dropped from English glassmaking in favour of a genuine native style. This style is best exhibited in the drinking glasses that, by the end of the 17th century and the beginning of the 18th, constituted the chief glory of the English (United Kingdom) industry. These often massive baluster-stem glasses were composed of a usually funnel-shaped bowl and a stem compiled of any of a large variety of pear-shaped and bulbous knops (ornamental knobs). In their simplicity and the harmony of their proportions they rank among the classics of the Queen Anne style.

      Toward the middle of the 18th century, taste in the arts generally inclined to lighter forms, and in glass this tendency was given additional impetus by an excise (1745–46) levied on glass by weight. Drinking glasses became slighter, the bowls smaller, and the stems taller and more slender. The loss in architectonic values was often offset by extraneous decoration. At first this tended to be concentrated in the stem. Bubbles of air had sometimes previously been enclosed in a knop forming part of the stem of a wineglass, and these bubbles were now drawn out and twisted so that they formed a cable of air ribbons inside a cylindrical stem. Stems of this type were popular about the middle of the century. Just before 1750 a stem decorated with threads of opaque white glass instead of air twists came into favour. These stems were made by much the same techniques as the Venetian latticinio glass. They remained in fashion until about the time of the second Glass Excise Act in 1777, which imposed a tax on the opaque white “enamel” glass, previously exempt.

      These forms of ornament had been restricted to the stems of glasses, but other methods of decoration were simultaneously evolved to embellish the whole glass. First of these was engraving, which had been sporadically practiced in England as early as the end of the 17th century. This work and the inscriptions, coats of arms, and arabesque borders in German style that were engraved during the first 20 years or so of the 18th century were undoubtedly the work of immigrant (probably German) artisans. By 1735, however, at least one English engraver was capable of executing such commissions and from about this time engraving on glass began to take on a more English character. An artless use of floral motifs, chinoiseries (Chinese themes), and scenes from country life is typical of the engraving of the third quarter of the 18th century, as were the frequent representations on glasses of Jacobite themes—portraits of the Old and Young Pretenders (James III and Charles Edward), the rose with buds, the honeysuckle, and the other flowers used in the symbology of the Stuart cause, together with the mottoes of such “loyal” societies as the Cycle Club.

 Engraving never reached great heights in England, but English glasses were in demand by engravers in Europe, particularly in the Netherlands, where the work of at least one notable artist—Jacob Sang, of Amsterdam—was almost exclusively done on imported English drinking glasses. English lead glass also seems to have been particularly favoured by the Dutch diamond-point engravers, whose work in this period was executed almost exclusively in stipple (i.e., dotted engraving). The chief masters of this delicate art, in which the design seems no more than a bloom on the surface of the glass, were Frans Greenwood of Dordrecht, the originator of the style (see photograph—>), and David Wolff of The Hague, whose work, if uninspired, is of high technical accomplishment.

      Enamelling, the second decorative technique of foreign inspiration, began to be used on English glass in the mid-18th century. It embellished opaque white glass in imitation of china—a type of work usually associated with the name of Michael Edkins, a Bristol artist, but in fact done in many parts of the country. Perhaps the most original work in this medium was done on clear glass by members of the Beilby family of Newcastle upon Tyne during the 1760s and 1770s. Their rendering in usually blue-toned white enamel of ruins, trophies of arms, and rural pastimes, often framed in scrollwork of the utmost delicacy, is one of the best things in English Rococo glass. Gilding was also used at this time to decorate glasses, usually with simple designs of vines and grapes.

      These ornamental techniques, however, were of ephemeral growth in England. Far more significant than any of them, because more firmly rooted in the very nature of English glass, was the art of cutting. Although literary references to cut glass occur before 1720, the earliest known pieces can hardly be dated much before 1725. On them the cutting is mainly confined to brims and feet, which are scalloped or notched; or, on wineglasses to the thicker parts of the glass, such as the stem, which might be fluted or cut in an allover pattern of flat diamonds. Throughout the period from about 1745 to 1770, shallow cutting was the norm. Diamonds, hexagons, flutes, and scale pattern were combined with segmental lunate cuts (produced by holding the glass at an angle to the cutting wheel) and with triangular and diamond motifs in very low relief. All of these elements could be combined to produce designs of great complexity and richness. This period marked the golden age of English cutting.

      About 1770 a plainer style, employing mainly flutes, responded to the rising Neoclassical fashion in the other arts. The flutes were sometimes combined with diamonds in relief. When further taxes were imposed on glass in 1777 and 1781 and when in 1780 trade between England and Ireland was freed, it was this relief-diamond style that was taken up in Ireland by the glasshouses founded there. The Irish glassworkers could afford to be more lavish with their material and on this thicker glass increasingly deeply cut diamonds and other relief motifs could be produced. About the turn of the century the diamonds began to be reduced in size and to be incorporated into a diaper pattern covering whole areas, often alternating with fields of larger truncated diamonds, the surfaces of which were themselves diversified with cut crosshatching. Such designs were often combined with deeply cut horizontal grooves. These styles, which were subsequently followed in England as well as in Ireland, finally led to a complete breaking up of the face of the glass into points and ridges, with increased prismatic effect but with a disastrous loss of surface quality, which is one of the peculiar beauties of glass. The prismatic brilliance was enhanced by the progressively greater purity and whiteness of the glass made during the second quarter of the 19th century. The temptation to cut ever more deeply and with greater complexity finally seduced the glassmakers into producing the “prickly monstrosities” of the Great Exhibition of 1851.

      Throughout the 18th century there had been great admiration in Europe for English lead “crystal,” and in the second half of it some of the European glasshouses were using lead oxide and had contrived to produce a comparable material. English cut glass was admired and exported, and the styles of cutting of the late 18th and early 19th centuries were much imitated abroad.

Robert Jesse Charleston

      Glassmaking was apparently the first industry to be transplanted from Europe in the wake of the Spanish conquerors. As early as 1535 glass was being made at Puebla in Mexico, and in 1592 a glasshouse was located in the territory of the Río de la Plata in the town of Córdoba del Tucumán, Argentina. Broken glass, undoubtedly of European origin, was remelted at Córdoba and fashioned into various objects including thick, semitransparent flat glass.

      The London Company (Virginia Company) of Virginia set up a glasshouse in Jamestown in 1608 for the manufacture of “glasses” and beads. A “tryal of glasse” was sent off to England before the winter of 1609, the “starving time” during which 440 of the colony's 500 inhabitants died. In 1621 the company tried again and, although the second attempt was more carefully planned, it too failed. Excavation of the site has revealed that glass was melted in considerable quantities though no evidence of glass bead manufacture has been found.

South Jersey-type glass (South Jersey glass)
      For more than a century after Jamestown, there was little American glass. The earliest successful glasshouse was begun in 1739 by Caspar Wistar in Salem County, New Jersey. The fact that his works produced only humble utilitarian vessels and windowpanes saved him from extermination by the “lords of trade.” Wistar died in 1752, after which the factory was operated by his son Richard. It was offered for sale in 1780. Although few, if any, objects exist that can be assigned to the Wistar Glass Works with certainty, it is important as the cradle of the American glass known today as South Jersey type. That glass is the work of individual glassblowers using ordinary bottle or window glass to make objects of their own design. Applied glass and, occasionally, pattern molding were the only feasible means of decoration, and the resultant loopings and threadings are typical of European traditions. One decorative device, the lily pad, is of particular importance, as no European prototype is known. A hot mass of glass applied to the base of the bowl is pulled up around the sides in a series of projections in which the bowl appears to rest.

      The second great name in early American glass is Henry William Stiegel (Stiegel, Henry William). Like Caspar Wistar, Stiegel at first was concerned with the manufacture of bottles and windowpanes, which he began in 1763 at his iron forge in Lancaster County, Pennsylvania, and continued in his new glasshouse at Manheim, also in Lancaster County, sometime after 1765. Encouraged by the patriotic adoption of the non-importation agreement, he ventured into the table-glass business, running many advertisements in which he favourably compared his wares with English imports. Later called the American Flint Glass Works, it failed in 1774 after adverse economic conditions, caused by both the approaching war and the colonial preference for imported tablewares.

      Few pieces can be attributed with confidence to the Stiegel factories, and, like that of Wistar, his name survives as the founder of a tradition. Stiegel-type glass is characterized by the use of clear and artificially coloured glasses; by extrinsic decoration such as engraving, enamelling, and pattern molding; and, in general, by two distinct styles, one employing English and the other German techniques and decorative devices. Certain mold-blown patterns, such as the diamond daisy and daisy in hexagon, are believed to have been originated at the Stiegel houses, no European prototypes having been identified.

Post-Revolutionary glassworks
      Before the turn of the century, several other glassworks were founded, but few survived the Revolution. These houses were devoted largely to the manufacture of bottles and window glasses and, with the notable exception of the New Bremen Glassmanufactory, most of the offhand (i.e., shaped by hand) pieces that can be tentatively assigned to them are of the South Jersey tradition. Three of these enterprises are of particular importance. First, the New Bremen (Maryland) Glassmanufactory, founded by John Frederick Amelung and Company, is of special interest as many of its presentation pieces are both signed and dated as well as being among the finest produced in the United States before 1800. Originally from Bremen, Germany, Amelung was persuaded to go to America for the express purpose of founding what he believed to be a much-needed industry. By 1785 his works offered green and white hollow ware for sale; by 1795 the glassworks themselves were offered for sale. One of the most famous pieces in the history of American glass is the Bremen Pokal (the German word for goblet), blown and engraved in 1788 and sent back to Amelung's financiers in Bremen, probably the only return they ever received on their investment.

      The second factory of importance, later known as the Olive Glass Works, Gloucester County, New Jersey, was completed in 1781 by former employees of the Wistar Glass Works, the Stanger brothers. In addition to the many fine South Jersey pieces attributed to this house, it is of interest because of its long history, eventually becoming part of the Owens Bottle Company, a forerunner of Owens-Illinois, Inc.

      The third notable venture begun before 1800 is the well-known works associated with the name Pitkin (Pitkin glass). Erected at East Hartford, Connecticut, near the Connecticut River in 1783, it was intended for the manufacture of window glass, but in 1788 it was converted to the manufacture of bottles and flasks. The factory thrived until 1830 and is best known for the half-post (i.e., dipped twice up to the neck) ribbed flasks in natural browns, ambers, and greens. Today the word Pitkin denotes a type of flask and not a specific glassworks.

After the War of 1812
      The few houses that survived the 1790s and the depression after the War of 1812 had multiplied to more than 90 by 1830. For convenience, the glassworks are divided into three geographical groups: New England, the Middle Atlantic, and the Midwest. Until that time, they had produced little more than simple imitations of European glasses, at best interesting and often very handsome combinations of various decorative devices and traditions. The big change occurred between 1830 and 1840 with the production of fine lead glass, the use of the full-size incised mold, and, finally, the pressing machine.

      The glasshouse known as Bakewell's (Bakewell glass) was synonymous with the finest achievements of the revived industry. Originally established in 1808 in Pittsburgh, the first city to use coal for fuel in glassmaking, the company survived under several different firms until 1882. Glass cutting, introduced to Pittsburgh by William Peter Eichbaum, glass cutter to Louis XVI, was an important part of Bakewell's operation. In addition to being the first American company to supply the White House, serving President James Monroe in 1817, Bakewell's produced such specialties as lead-glass tumblers with “sulphides” (cameo insertions of white fireproof material in an envelope of glass) in the bases portraying the Marquis de Lafayette, Andrew Jackson, New York governor George Clinton, Benjamin Franklin, and George Washington. The company also held the first patent on mechanical pressing, granted in 1825 for a device to make knobs.

      Fine lead glass (flint glass) in the New England area was first successfully made in the South Boston works of the Boston Crown Glass Company. Thomas Cains was making flint glass there in 1813. He left the firm in 1824 to found the Phoenix Glass Works in South Boston, which survived until 1870. One particular device usually associated with the Boston manufactories of this period is the guilloche, or chain, employed in the decoration of a large variety of tableware.

      The New England Glass Company, founded in 1818 in Cambridge, Massachusetts, maintained the same high standards as Bakewell's, even to the point of making glass for President Monroe. This factory held the second patent on a device for mechanical pressing, granted in 1826, and produced quantities of pressed glass of all types before it was moved to Toledo, Ohio, in 1888. The New England Glass Company was also famous for its very fine free-blown and engraved glass. In addition, vessels were made there in the so-called blown three-mold technique, in which decorative designs adapted from cut-glass patterns of the period were impressed in the glass by blowing in molds hinged in two, three, or more sections. More than 400 different molds have been determined and grouped according to pattern under three primary headings: geometric, arch, and Baroque. By 1830 this type of production was being replaced by the much more efficient pressing machine.

      Deming Jarves, one of the founders of the New England Glass Company, founded the Boston and Sandwich Glass Company in 1825. Because of his Reminiscences of Glassmaking, extensive advertisements, and thorough excavations of the factory site in Sandwich (Sandwich glass), Massachusetts, more is known about this particular factory than any other of the period. Consequently, “Sandwich” has become a generic term for pressed glass even though many other factories used identical machinery and, in some cases, identical molds. Jarves's first patent on a pressing device, the fifth to be granted, was received in 1828 after the Boston mold maker Hiram Dillaway entered his employ. Jarves founded the Mount Washington Glass Works in 1837 in New Bedford, Massachusetts, and the Cape Cod Glass Works in 1857.

      Among the outstanding makers of fine lead glass in the middle Atlantic states were the Brooklyn Flint Glass Works of John L. Gilliland and Company and the Dorfinger Glass Works. Gilliland, a partner in the Blooming-dale Flint Glass Works, sold out in 1823 and founded his own works in Brooklyn, New York. In 1864 two members of the Houghton family acquired controlling interest, and in 1868 the works was moved by barge to Corning, New York, to form part of the now famous Corning Glass Works.

Historical flasks
      Perhaps the most fascinating aspect of American glass is a series of pictorially molded bottles known as historical flasks, produced between 1815 and 1870. Some three hundred ninety-eight different surviving examples have been divided into the following groups: (1) Masonic; (2) emblems and designs related to economic life; (3) portraits of national heroes and designs associated with them and their deeds; and (4) portraits of presidential candidates, emblems and slogans of political campaigns. In the second group are a number of interesting designs encouraging the United States system of better internal transportation and high protective tariffs. Among the 16 celebrities portrayed in the third and fourth groups are Jenny Lind, the Swedish singer; Lajos Kossuth, the Hungarian patriot; Marquis de Lafayette, the French hero of the American Revolution; and the notorious Thomas W. Dyott, a patent-medicine vendor and bottle manufacturer. These containers were used also as propaganda during political campaigns. William Henry Harrison is pictured in this connection with other impedimenta relative to the “Log Cabin and Hard Cider” campaign of 1840.

      The first 25 years of pressed glass, 1825 to 1850, are referred to by collectors as the “lacy period.” A milestone within this brief span occurred in 1830 with the development of the cap ring, a device that ensured uniform thickness at the edge of each piece regardless of the amount of glass forced into the mold. Before this date most impressed designs were inspired by Anglo-Irish cut glass, often coupled with popular American devices such as a sheaf of wheat. Between 1830 and 1840 the objects were thinner and more lavishly decorated, often including elaborate motifs based on the classic and Gothic revivals. Because of the unpleasant surface left by the mold and in an effort to imitate the brilliance of cut glass, unstippled areas were filled in with overall lacelike patterns; hence the term “lacy.” About 1840 economic conditions forced glassmakers to revert to cheaper molds and simpler geometric forms and to abandon the stippled patterns.

      During this period the mechanical press became firmly established, and by mid-century glassmaking had become one of the United States' new mass-production industries.

Thomas S. Buechner

Mid-19th to 20th century
      The modern history of glass can be said to begin in the middle of the 19th century with the great exhibitions and with the new self-consciousness in the decorative arts that they expressed. Glassware was being publicly discussed in art journals and collected in museums, and this new spirit of awareness led to a greatly increased exchange of ideas among the leading glass centres and to the borrowing of ideas from the past.

      In some degree the established glass-producing centres were still concerned in the modern period with the styles of glassware for which they had achieved an earlier reputation. The English glasshouses continued their production of deeply cut crystal; engraved glass and to a lesser extent coloured and painted glass were given the greatest attention in central Europe; the Venetian glasshouses at Murano were the leading exponents of furnace-manipulated glass. But alongside these traditional methods of using and decorating glassware can be discerned the development of a renewed interest in the beauty of the material itself. Expressed in various ways, in the use of thick masses and in internal figuring and patterning, this interest has been the keynote of the most significant modern contributions to the art of glass.

      Pressed glassware, which had been first made with great promise in the first half of the 19th century, was being widely made in the middle of the century, and later, as a cheap imitation of cut crystal. The decorative possibilities of the process continued, however, to be exploited in a variety of popular wares; and in the 20th century a series of new simple forms of pressed glassware appeared that had been expressly designed in relation to the characteristics of its manufacture.

Great Britain (United Kingdom)
      The Great Exhibition of 1851 was the culmination of a period of intense activity in the British glasshouses. The excise duty on glass had been removed in 1845, and the British glassmakers were determined not only to excel in their traditional deeply cut crystal but also to rival the Bohemians and the French in coloured, layered, and enamel-painted wares. Probably the most enterprising of the English glassmakers of the period was Benjamin Richardson (Richardson, Benjamin), of Wordsley near Stourbridge; surviving pieces of this period from the Richardson firm include some admirable painted and engraved pieces as well as crystal wares deeply cut in bold patterns.

      Probably in reaction against the banality of pressed-glass imitations of cutting, the most sophisticated work in crystal during the later 1850s through the 1870s was decorated by engraving, often carried out by immigrant Bohemian craftsmen.

      The Venetian style of furnace-manipulated glass was also exerting a strong influence. It can be seen, for instance, in the development of the elaborate Victorian centrepieces in the 1860s and 1870s. In some degree the Venetian style was also an influence, alongside that of the Far East, in the fashioning of the fancy wares that were made in Great Britain—as it was in the United States and elsewhere—during the 1880s and 1890s. These wares were often given specific trade names and were mostly made in the English Midlands by firms such as Thomas Webb & Sons of Stourbridge and John Walsh Walsh of Birmingham.

      A striking form of mid-Victorian virtuosity was the cameo glass produced by Stourbridge glassworkers. This work, inspired by the Portland vase, required a lengthy process of etching and carving, normally through an opaque-white-glass layer to leave a white carved design in relief on a dark-coloured glass body. The first important pieces, such as the “Pegasus vase,” were produced in the 1870s by John Northwood (Northwood, John), and in the later part of the century the most distinguished cameo work was carried out by George Woodall.

      The influence of the Arts and Crafts Movement was toward the use of plastic forms and furnace decoration, which the English art critic John Ruskin had advocated in The Stones of Venice. In 1859 Philip Webb designed for William Morris some simply formed tableware that was made at the London glassworks of James Powell & Sons. From about 1880 this glassworks was under the control of Harry J. Powell who, working until World War I, developed a simple, dignified style of handmade blown glass, which was subsequently continued in designs by Barnaby Powell, James Hogan, and others.

      During the 1930s and after World War II other firms produced work in which a restrained and distinctively modern approach was made to the cutting of faultless crystal glass. Notable designs were produced by Keith Murray for Stevens & Williams shortly before World War II and by David Queensberry (12th marquess of Queensberry) for Webb Corbett in the 1960s. Among the more distinguished glass engraving may be mentioned the diamond-point fantasies of Laurence Whistler and the work of John Hutton, made by a movable wheel held in the hand, such as his great screen in the new Coventry Cathedral. The appearance of new factories in the 1960s, concerned primarily with form and colour, widened the scope of British glass design; and at this time the glass-teaching schools were especially significant as centres for original work by individual artists.

United States
      By the middle of the 19th century, American pressed glass was already a disturbing influence on the design of the finer wares. Its decoration was by that time mostly designed in imitation of cut glass, and the process of fire polishing was being used to give a surface almost as smooth as that of blown glass. During the succeeding decades pressed-glass designs became increasingly complicated. This tendency was accentuated in the soda-lime glass that William Leighton began to use for pressed work at Wheeling, West Virginia, in the 1860s, and that was later widely used in the western glasshouses for the cheapest coloured wares.

      In general the finer wares of the early part of the period were similar to those of the Biedermeier and later styles of Europe. The New England Glass Company at Cambridge, Massachusetts, was employing many European craftsmen and was producing a wide variety of richly decorated layered and engraved wares. At the Boston and Sandwich Glass Company layered glass was extensively used for large kerosene lamps. The effect of the competition of pressed glass on cut-crystal work can be seen in the appearance of fine-line cuttings, and, during the period up to the Philadelphia Centennial Exposition of 1876, the most significant crystal work was decorated by engraving. Louis Vaupel and Henry S. Fillebrown were two notable engravers employed by the New England Glass Company from 1856 and 1860, respectively.

      At the time of the Centennial Exposition, cut-crystal work began to revive, and by 1880 a considerable boom in its production had developed—a boom that was to continue throughout the 1880s and 1890s. New industrial methods contributed to the production of crystal glass of flawless quality and to its deep cutting with mathematical accuracy in elaborate designs. Among many others, a noteworthy producer of this type of glass in the 1890s and later was the Libbey Glass Company, the successor to the New England Glass Company. Later, in the early years of the 20th century, intaglio cutting in crystal became popular, and work in this expensive process was carried out in a number of cut-glass factories such as the T.G. Hawkes Glass Company at Corning, New York.

      As in Great Britain and elsewhere, a great amount of glass was made in fancy forms and colours in the 1880s and 1890s. Although undisciplined and often tasteless, such glass nevertheless preserves perhaps more than any other the flavour of the period. These wares, often bearing specific names such as Pomona, Burmese, and Peachblow, were made by such firms as the New England Glass Company, the Mount Washington Glass Company at New Bedford, and the Hobbs, Brockunier Company at Wheeling, West Virginia.

      Although belonging essentially to the category of the fancy glasses, the Favrile glass of Louis Comfort Tiffany (Tiffany, Louis Comfort) represented an altogether higher level of achievement both in its shapes and in the colouring and figuring of the glass. It was first shown to the public in 1893, and in pieces that were produced a few years later Tiffany achieved an outstanding expression in glassware of the Art Nouveau style. Much of his work was in a heavily lustred glass that was considerably admired abroad, especially in central Europe where it created a new fashion.

      From the period of World War I onward, new forms of pressed glassware appeared in simple, satisfying designs appropriate to their purpose and the process of manufacture, such as the Pyrex ovenware shapes of the Corning Glass Works. The Steuben Glass Company of Corning was known for fancy glasses designed by Frederick Carder, until in 1933 the company was given a change of direction by Arthur Amory Houghton, Jr., who, with the help of John Monteith Gates and the sculptor and designer Sidney Waugh, aimed to produce glass with engraved decoration that would rank as fine art. Other noteworthy modern American work included simple designs in blown glass by the Blenko Glass Company of Milton, West Virginia, and enamel patterned bowls by the independent artist Maurice Heaton. The appearance in the United States of studio blown glass, produced by individual artists, was a development of international significance. It was initiated in the 1960s notably by Harvey Littleton and Dominick Labino and included work such as that produced personally by Joel P. Myers at the Blenko Glass Company.

Czechoslovakia, Austria, and Germany
      In the middle of the 19th century the glasshouses of central Europe were producing a great variety of the layered and coloured wares that had become particularly associated with Bohemia in the preceding Biedermeier period. They were also producing a great amount of cut (cut glass) crystal glass in the deeply cut English style, and indeed work of this nature continued with little change throughout the modern period.

      A revival of the indigenous art of engraving was initiated by Ludwig Lobmeyr, who from 1864 was in control of the Viennese firm of J. and L. Lobmeyr. His first opportunity came at the Paris International Exhibition of 1867, and his reputation was firmly established at the Vienna International Exhibition of 1873. He commissioned designs for his glasses from the leading Viennese architects and painters of the time, and his work was carried out by the finest craftsmen in Bohemia and Austria.

      The Art Nouveau style, which went under the name of Jugendstil in central Europe, made a deep impression on central European glassware. The work made around the turn of the century abounds in slender shapes and flowing organic motifs. Glasses designed by Karl Köpping in Berlin, with long, waving stems and tulip-like bowls, were perhaps the extreme instance of Art Nouveau style applied to glassware. In 1897 an exhibition of glass by Tiffany was shown at several of the museums in the area. Not only the forms of the Tiffany glasses but also their figured and heavily lustred material (lustred glass) attracted great interest. Several factories started making a similar heavily lustred glass, including the firm of J. Lötz' Witwe of Klášterský Mlýn (Klostermühle), which won a grand prix at the Paris Exhibition of 1900 with this type of glassware.

      From around 1900 onward a movement toward a modern purist approach to glass was largely fostered by the work of designers connected with the Vienna Kunstgewerbeschule (School of Industrial Art). Men such as Kolo Moser and Josef Hoffmann, who were also closely associated with the Vienna Werkstätte (Workshop), were designing glasses in simple rational forms. Much initiative in this movement was shown by the firms of E. Bakalowits Söhne of Vienna and J. Lötz' Witwe. The Czech architect Jan Kotěra was influential in the modern design of glass, and in the early years of World War I the Czech Artěl organization of artists and architects was concerned with the design of glass in a forward-looking Cubist manner.

      After World War I the outstanding figure in Czech (Bohemia) glass art was Josef Drahoňovský, who was professor at the Prague School of Industrial Art. He was essentially a sculptor, and most of his glass designs were for sumptuously engraved glass of a monumental quality. His colleague in Prague, Jaroslav Horejc, designed for engraved work of a broadly similar character, some of it for the Lobmeyr firm of Vienna. The decades after World War II saw considerable activity in glass design. Notable artists in the 1960s were Stanislav Libenský, René Roubíček, Pavel Hlava, and Václav Cígler.

      In Austria after World War I the Lobmeyr firm under the control of Stefan Rath produced many engraved and relief-carved pieces designed by artists such as Ena Rottenberg, Lotte Fink, and Vally Wieselthier. Lobmeyr also produced some of the best designs of Michael Powolny, who had his own workshop and had designed for the firm of J. Lötz' Witwe.

      In Germany the outstanding engraver and glass carver of the period after World War I was Wilhelm von Eiff, a professor at the Stuttgart Kunstgewerbeschule. Bruno Mauder of the glass-teaching school at Zwiesel in Bavaria advocated the use of natural and appropriate glass forms. Some fine tablewares were produced, especially after mid-century, by designers such as Wilhelm Wagenfeld, Richard Süssmuth and Heinrich Löffelhardt. An interesting development was that of the Rosenthal firm, which used the Finnish designer Tapio Wirkkala and the Dane Bjørn Wiinblad to effect in each case matching glass and porcelain suites of the firm's own manufacture.

      In France, as in central Europe and in England, the production of fine glassware in the middle of the 19th century was mainly divided between cut crystal and coloured wares. The “opalines,” the semi-opaque white and coloured wares, often with elaborately painted and gilt decoration, were especially popular; and it was during these years that the French paperweights, containing coloured patterns, became internationally known and admired. The larger factories, particularly Baccarat and Saint-Louis, continued to participate in the international fashions of the rest of the century and beyond. But in France inventive genius manifested itself mainly in the work of individual artists and thereby a new spirit was introduced into the modern conception of glass.

      In the late 1860s and 1870s three individual artists were experimenting in glasswork, and all of them were represented in the International Exhibition of 1878 in Paris. The first was Joseph Brocard, who was studying the enamelling of glass and whose main ambition was to reproduce medieval Syrian glass. The second was Eugène Rousseau, a commissioning dealer in ceramics who had turned to glasswork at the end of the 1860s and was at the height of his achievement in the years c. 1880. Typically his glasses were thick walled and translucid, often with interior crackling and shot with random streaks of colour. In 1885 he associated with E. Léveillé, who continued to work in a similar style after Rousseau's death in 1891. The third of the individual artists at the 1878 exhibition and the best known of them was Émile Gallé (Gallé, Émile) of Nancy, who had been experimenting in glasswork since about 1867. His earliest work was in clear glass, lightly tinted and decorated with enamel and engraving. But he soon developed the use of deeply coloured, almost opaque glasses in heavy masses, often layered in several thicknesses and carved or etched to form plant motifs. His work reflected the prevailing interest in Japanese art and with its frequently asymmetrical form contributed largely to the Art Nouveau of the end of the century. In this period much of Gallé's manner was reflected in the glassware produced on a more commercial basis by the firm of Daum Frères of Nancy.

      A number of French artists successfully explored the use of pâte de verre (powdered glass fired in a mold). The pioneer in its use was Henri Cros, who was working near the end of the 19th century. It was later the medium for important work by Albert Dammouse and François Décorchemont.

      Among the later leaders of French glass art was René Lalique (Lalique, René), who around the 1920s was producing his most typical work, which is characterized by relief decoration produced by blowing into molds or by pressing. He was a leading advocate of the use of glass in architecture and much of his work was in the form of lighting equipment and in details of interior decoration. The work of his contemporary, Maurice Marinot (Marinot, Maurice), was more in the tradition of Rousseau, with heavy, thick-walled vessels in strong forms often with boldly cut-away abstract decoration; and Henri Navarre in the 1930s was producing work of a similar monumental nature.

      The most significant work of Jean Luce and Marcel Goupy, designers of glass and ceramics, was in the production of elegant tablewares. For a long period André Thuret made glasses in thick plastic forms; and Jean Sala worked in bubbled glass. The firm of Daum was distinguished, after World War II, by its thick clear glass vessels manipulated into flowing shapes to designs by Michel Daum.

The Scandinavian (Scandinavia) countries
      Up to the time of World War I the Swedish glass industry produced little original work. The sudden development of modern Swedish glass in the 1920s was attributable mainly to the initiative of the Swedish Arts and Crafts Society that resulted in the employment of the painters Simon Gate and Edward Hald by Orrefors (Orrefors glass) glassworks and Edvin Ollers by Kosta glassworks, both in the glass-producing area of Småland in southern Sweden. The first results were exhibited in Stockholm in 1917 and consisted of handblown, undecorated tablewares, together with the luxury “Graal” glass with internal stained decoration, which had been rapidly developed under Gate's inspiration at Orrefors. It was, however, engraved glasswork, chiefly that designed by Gate and Hald at Orrefors, on which the reputation of Swedish glass was established in the 1920s and particularly at the Paris International Exhibition of Decorative Arts in 1925.

      In the 1930s came a change of direction. The Swedish factories began to take less interest in engraving and followed the initiative of the French artists in making thick tinted and figured glasses. In this mode they found their greatest success—attributed largely to their having achieved a system of intimate association between the artists and the glassmaker craftsmen.

      At Orrefors additional artists were added to the establishment from 1929 onward, including Vicke Lindstrand, Sven Palmqvist, Nils Landberg, Edvin Öhrström, John Selbing, and Ingeborg Lundin. Each of them worked in an individual style, and in addition to decorative pieces many of them designed tablewares for the subsidiary Sandvik factory. At Kosta important work was produced by Elis Bergh and later by Lindstrand. Gerda Strömberg designed for both Eda glassworks and for Strömbergshyttan. In the 1960s many new methods of forming and decorating glass were explored by young designers; and an element of the current Pop art was discernible, such as in the work of Gunnar Cyrén at Orrefors.

      In Denmark the Holmegaard glassworks and in Norway the Hadeland glassworks both followed in some respects the example of Swedish glass. At Holmegaard the movement began in the late 1920s with the appointment as art director of Jacob E. Bang, whose designs included an amount of striking engraved work, and was continued in the clean forms of his successor, Per Lütken. At Hadeland some distinctive glass was designed by a number of artists including Sverre Pettersen, Willy Johansson, and Arne Jon Jutrem.

 In Finland original modern work of great significance has been carried out. Following the example of the Swedish factories, the artist Henry Ericsson was appointed designer at the Riihimäki glassworks in the late 1920s, and Göran Hongell was employed in a similar capacity at the Karhula glassworks in the 1930s. At this time the well-known Finnish artists Arttu Brummer and Alvar Aalto were also concerned in glass design. Shortly after World War I the influential designer Gunnel Nyman was producing glasses freely blown in thick masses to form asymmetrical shapes. Other important designers were Tapio Wirkkala and Timo Sarpaneva working for the Iittala glassworks (see photograph—>), Kaj Franck for the Nuutajärvi glassworks (trading as Wärtsilä-Notsjö), and Helena Tynell and Nanny Still for Riihimäki. In the 1960s Timo Sarpaneva struck a new note with his sculptures formed from the charred inner surface of wooden molds, while Oiva Toikka designed for Wärtsilä-Notsjö objects of a markedly Pop art nature.

Belgium and the Netherlands
      In Belgium the Val-Saint-Lambert factory was an important producer of heavily cut crystal throughout the period. It is also associated with layered work and was particularly prominent with original work of this nature around 1900. Later Charles Graffart designed for it wares made in a variety of techniques, some of them with engraved decoration.

      The Dutch (Netherlands, The) glassworks at Leerdam played an important part in the modern movement and followed a line of development distinct from that of the Scandinavian factories. In 1915 the decision was made to invite designs from artists, and by the early 1920s excellent simple tablewares were being made to designs by the architects K.P.C. de Bazel and H.P. Berlage and by the decorative artist C. de Lorm. From the early 1920s onward individually designed pieces called Unica were made; some of the earlier examples were by Chris Lebeau, but most were produced by Andries D. Copier. Later decorative work included designs by Floris Meydam and Willem Heesen.

      By the middle of the 19th century, Italian glassmaking had partly revived. In the 1860s the Museo Vetrario was founded at Murano (Venice), and Antonio Salviati began to produce the glasses that attracted much attention at the Paris Exhibition of 1867. These were variations of the traditional Venetian style with elaborate furnace decoration, and the production of glasses of this nature continued at Murano throughout the remainder of the 19th century and beyond.

      The 1920s saw the development of a more conscious spirit of artistry in Italian glasswork. Paolo Venini was concerned in producing simple elegant glasses designed by the decorative artist Vittorio Zecchin; and G. Balsamo Stella and his Swedish wife Anna were producing engraved work. In later years, both before and after World War II, much research was done in new methods of colouring and figuring glass; the results were seen in the glasses designed by Ercole Barovier for the firm of Barovier & Toso and in those designed by Giulio Radi for the firm Arte Vetraria Muranese.

      From the Venini firm, presided over by Paolo Venini until his death in 1959, came many interesting innovations, such as the colourful glasses designed by Carlo Scarpa and by Fulvio Bianconi and an interesting series by the Finn Tapio Wirkkala. For the firm of Vistosi some striking modern glasses were designed by artists such as Peter Pelzel and Alessandro Pianon. Some of the work, such as a series of vases designed by Flavio Poli for Seguso Vetri d'Arte, showed some influence from the thick-glass techniques of the north, but the modern Italian glass mostly retained a distinctly Venetian, volatile character. An experiment of interest was the production of a series of glass sculptures from sketches and models commissioned by the dealer Egidio Constantini from internationally prominent painters and other artists.

Hugh Wakefield

Chinese glass
      Glass has never been truly at home in China. Records suggest that it was brought there from the West as early as the 3rd century, but finds of small glass objects of typical Chinese shapes dating from as early as the Han dynasty (206 BC–AD 220) suggest that, even if the material was brought from the West, it could be worked on the spot to conform to Chinese usage. It was no doubt regarded as a cheap substitute for jade. The Chinese themselves do not claim to have made glass before the 5th century, and even then it is doubtful if they knew more than how to make beads and other similar small objects. The vessels of glass occasionally found in burials of the T'ang (Tang dynasty) (618–907) and later dynasties, although perhaps locally made, are more likely imports. Of the extant glass vessels typically Chinese in form, none can be shown to be of a date earlier than the reign of the K'ang-hsi emperor (1661–1722), and there is every likelihood that glassmaking was in fact introduced in this period when, through the Jesuits, China became vividly aware of Western culture. To this period probably belongs a series of bowls and vases of which the blown character is manifest. They are often of a deteriorated material that appears to suffer from the same defects as European glass of the same epoch.

      During the reigns of the Yung-cheng (Yongzheng) (1722–35) and Ch'ien-lung (Qianlong) (1735–96) emperors, the emphasis on blown forms is subordinated to the desire to make glass a surrogate for natural stones. Although the colours used are often not such as are found in nature, the glass is handled as though it were jade, the foot in particular being fashioned as though cut from stone. This lapidary treatment is further emphasized in the cased glass bottles cut on the wheel in such a way that the design stands in one or more colours on a ground of a contrasting tone.

Robert Jesse Charleston

Additional Reading
There is ample literature on the history of glass. The following selection of titles includes basic reference works and handbooks as well as some specialized studies many of which contain bibliographical references. In addition, the Journal of Glass Studies, issued annually by The Corning Museum of Glass, includes extensive bibliographies.The basic sources for medieval glass manufacture are Heraclius, Von den Farben und Künsten der Römer, ed. by Albert Ilg (1873); and Theophilus Presbyter, Schedula diversarum artium, ed. by Albert Ilg (1874; Eng. trans., On Divers Arts: The Treatise of Theophilus, 1963). Georg Agricola, De re metallica (1556; Eng. trans., 1912, reprinted 1950); and particularly Antonio Neri, L'arte vetraria (1612; Eng. trans. by Christopher Merret, The Art of Glass . . . , 1662), describe in detail glassmaking in the 16th and 17th centuries. See also Johann Kunckel, Ars vetraria experimentalis, 2 pt. (1679). Other technological studies are Apsley Pellatt, Curiosities of Glass Making (1849); and Alfred Lucas, Ancient Egyptian Materials and Industries, 4th ed. rev. (1962). Development of glass technology in history is discussed in Ruth Hurst Vose, Glass (1980).Edward Dillon, Glass (1907); Robert Schmidt, Das Glas, 2nd ed. (1922); and W.B. Honey, Glass: A Handbook . . . Victoria and Albert Museum (1946), are among the best and most comprehensive general surveys of the history of glass. Masterpieces of Glass (1968), a catalog of some of the holdings in the British Museum, is a scholarly publication on the subject in general, accompanied by a large bibliography. Charles G. Janneau, Modern Glass (1931), is a review of world glass at the beginning of the 1930s. For a general study of the international development of art glass, see Ada Buch Polak, Modern Glass (1962). Geoffrey W. Beard, Modern Glass (1968), provides a brief account of modern glasswork from various countries.Comprehensive illustrative material on glass of the ancient world is found in Gustavus A. Eisen and Fahim Kouchakji, Glass, 2 vol. (1927); the most scholarly survey is that of The Corning Museum,Glass from the Ancient World: The Ray Winfield Smith Collection (1957). Roman glass in particular was treated exhaustively by Anton Kisa in Das Glas im Altertume, 3 vol. (1908). Basic treatises on pre-Roman glass include H.C. Beck, “Glass Before 1500 B.C.,” in Ancient Egypt and the East, pt. 1, pp. 7–21 (June 1934); Poul Fossing, Glass Vessels Before Glass-Blowing (1940); and Birgit Nolte, Die Glasgefässe im alten Ägypten (1968). In addition to Kisa (op. cit.), general books on Roman glass, such as Morin-Jean, La Verrerie en Gaule sous l'Empire romain (1913); Clasina Isings, Roman Glass from Dated Finds (1957); and Donald B. Harden, Roman Glass from Karanis Found by the University of Michigan Archaeological Expedition in Egypt 1924–29 (1936), are important for the understanding of this period. The latter has become the standard reference work for describing and cataloging ancient glass in general.Western glass of the 5th–8th centuries is treated in detail by D.B. Harden, “Glass Vessels in Britain and Ireland, A.D. 400–1000,” in Dark Age Britain (1956). The standard handbooks on Islāmic and Western medieval glass are still Carl J. Lamm, Mittelalterliche Gläser und Steinschnittarbeiten aus dem Nahen Osten, 2 vol. (1929–30); and Franz Rademacher, Die deutschen Gläser des Mittelalters (1933). Byzantine glass is described in Joseph Philippe, Le Monde byzantin dans l'histoire de la verrerie, Ve–XVIe siècle (1970). The basic handbooks on French and Belgian glass are James Barrelet, La Verrerie en France de l'époque gallo-romaine à nos jours (1953); and Raymond Chambon, L'Histoire de la verrerie en Belgique du IIe siècle à nos jours (1955), the latter including ample bibliographic references on literary sources. William A. Thorpe, A History of English and Irish Glass, 2 vol. (1929), is still the standard reference work on English glass while Hugh Wakefield covers Nineteenth Century British Glass (1961). German, Bohemian, and Austrian glass is treated exhaustively in Robert Schmidt, Die Gläser der Sammler Mühsam, 2 vol. (1914–27). For polychrome painting on vessels, see Axel von Saldern, German Enameled Glass (1965). The handbooks on glass from c. 1800 to c. 1900 are Gustav Pazaurek, Gläser der Empire und Biedermeierzeit (1923) and Moderne Gläser (1901). Astone Gasparetto, Il vetro di Murano dalle origini ad oggi (1958), is the basic reference work on Venetian glass. The best surveys on Spanish glass are Josep Gudiol y Ricart, Los vidrios catalanes (1941); and Alice Wilson Frothingham, Spanish Glass (1964). For Scandinavian material, Ada Buch Polak, Gammelt Norsk Glass (1953); and Heribert Seitz, Äldre Svenska Glas . . . (1936), should be consulted—both contain an English summary.Glass in the United States has been dealt with in great detail by George S. and Helen McKearin in American Glass (1948) and Two Hundred Years of American Blown Glass, rev. ed. (1966). Lura W. Watkins, American Glass and Glassmaking (1950, reprinted 1970), presents a useful outline of 19th- and 20th-century American glass. Ray and Lee Grover, Art Glass Nouveau (1967), is valuable for its colour illustrations of 19th- and 20th-century fancy glasses in American collections. See also Mary Jean Madigan, Steuben Glass: An American Tradition in Crystal (1982); and Gerald Stevens, Glass in Canada (1982).On Chinese glass, see W.C. White, Tombs of Old Lo-Yang (1934); Friedrich Hirth, China and the Roman Orient, pp. 228–234 (1885); W.B. Honey, “Early Chinese Glass,” Burlington Magazine, 71:211–223 (1937); and H.C. Beck, “Far Eastern Glass: Some Western Origins,” Bulletin of the Museum of Far Eastern Antiquities, 10:1–64 (1938).

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