Chinese glass, snuff-bottles, 351-352 Chinese glass, snuff-bottles, varieties of technique, 352 Chinese glass, composition, 353 Chinese glass, made in Shantung, 353 Chinese glass, where made, 353 Chinese glass, snuff-bottles, analyses of, 353 _note_ Chinese glass, relation to contemporary French glass, 354 Chinese motives on Saracenic glass, 155 Chinese porcelain, enamelling on, 170 Christian subjects on engraved Roman glass, 75, 94 Church, Professor, analyses of glass, 335, 353 _note_ ‘Claw’ handles on Roman glass, 62, 83 Cluny Museum, Saracenic glass, 166 Coal, use of, for glass furnace, 309-310 Coal, involves ‘closed pots,’ 310 Cobalt in Venetian glass, 218 Cobalt blue of mediæval window-glass, 133 _Cogoli_, white pebbles, 215, 317 Coin-like discs of glass in Egypt, 146-147 Colbert and plate-glass, 210, 235 Colchester, Roman glass from, 86 Colours of primitive Egyptian glass, 26-29 Colours of Roman glass, 52-53 Comarmond collection in British Museum, 81 Composition of glass, 8-9, 12-13 Composition, normal type, 9 _Compositiones ad Tingenda_, quoted, 120-121 Constantinople, influence of, 95-96 Contemporary glass, 356-360 _Conterie_, a class of Venetian beads, 183 _Coppa Nuziale_, 194-195 Copper, importance of, in colouring of ancient glass, 26, 35 _note_ Copper, the red suboxide in Egyptian glass, 27-28 Copper, the red suboxide in Roman glass, 52-53 Coptic glass from Egypt, 105 Coptic churches, lamps from, 106 Coptos, enamelled glass cup from, 163 Corundum or emery used in cutting glass, 74 _note_ Cosmati mosaics, 140 Crackle or frosted glass of Venice, 203 Crimea, primitive glass from, 37 _Cristallo_ of Venice, 200 _Cristallo_, how decorated, 201-202 _Cristallo_, in pictures of Venetians, 202-203 _Cristallo_, glasses broken at feasts, 203 _Cristallo_, replaces _verre de fougère_, 220-221 _Cristallo_, spread over Western Europe, 220-222 _Cristallo_, in Low Countries, 241 _Cristallo_, in Germany, 256-258 Cros, Henri, his _pâte de verre_, 359-360 Crotchet Friars, glass made at, 308 Cuthbert on glass-workers brought from Mainz, 113 ‘Cylinder-process’ described by Theophilus, 128-129 ‘Cylinder-process’, used for mirror-glass, 209, 210 _note_ ‘Cylinder-process’, used by Lorrainers, 303 Cyprus, primitive glass from, 36, 37-38 Cyprus, enamelled glass from, 47 Czihak, Von, _Schlesische Gläser_, 259 _note_ _Damas, verre de_, 136 _Damas, façon de_, 181 Dante on glass mirrors, 138 Decay of glass, 15-17 Decay of glass, apparent capricious action, 15-16 Decay of glass, chemical process involved, 16 Decay of glass, follows internal structure, 16 Decay of glass, iridescence, 16-17 Decay of glass, fissuring or crackle, 17 Denderah, primitive glass of Roman times from, 32 Destruction of timber, outcry against, 309 Diamond-scratched Venetian glass, 209 Diamond ‘scratching’ on glass, 276, 277 Diamond ‘scratching’ in Holland, 295 _Diatretum_ work, how made, 64 _note_