Sidon, Venetians at, 176 Signatures of makers on Roman and Phœnician glass, 87-88 Signatures, rarely found on glass, 88 Signatures on Saracenic enamelled glass, 155 Silesia, engraved glass of, 285 Silica, amount of, in glass, 9-10 Singer, Mr. J. Webb, his collection of glasses, 324 _note_, 328 ‘Singing glasses,’ 331 Slade collection, catalogue of, 51 _note_ Slavonic tombs, no glass in, 114 _note_ Snuff-bottles, Chinese, 351-352 Soap-making, its relation to glass, 41-42 ‘Soap of glass’ (manganese), 77 Soda, the normal alkali of glass, 9-10 Soda, or maritime group of glass, 10-11 Soda, source of, 12-13 Soda, in Venetian glass, 214 South-Saxon Cemetery, Byzantine glass from, 107 Southwark, early glass-houses, 302, 312 Spanish glass, 245-250 Spanish glass, green glass of south, 245-246 Spanish glass, literature, 246 _note_ Spanish glass, Catalonia, 247-249 Spanish glass, Altarists and Muranists, 249-250 Spanish glass, decline in eighteenth century, 250 Spanish Netherlands, glass of, 240-244 ‘Spear-butt’ shaped lamps, 97 ‘Spear-butt’, in use in Italy, 158 _Spechter_, cylindrical beaker, 266 Specific gravity of glass, 12 Spessart forest, glass from, 266 Spheres in connection with suspended mosque lamps, 156-172 ‘Spinning’ or ‘flashing’ to form a disc of glass, 15 Splashed decoration on Egyptian cosmetic pots, 31 Splashed decoration on Roman glass, 64 Splashed decoration on Venetian glass, 208 Splashed decoration on French Renaissance glass, 238 Splashed decoration on glass made at Bristol, 335-336 Stained glass windows, of St. Sophia, 96 Stained glass, French, composition of, 131 Stained glass how coloured, 132-133 Steinschönau, glass industry, 286, 293 _Stimpler_, bungling workman, 281, 285 _Stip_ engraving of Dutch, 297-298 Strabo on Roman glass, 60-61, 80 Strabo on glass of Alexandria and Syria, 80 Sulphur in glass, changes of colour, 17 _Suppialume_ process, 187 Susa, glass from, 41 _note_ Susa, Sassanian or Byzantine glass from, 104 Sussex glass-work, 139-140, 301-302 Switzerland, glass painters of, 263-264 Synesius, treatise on alchemy, 120 Syria, glass early made in, 38-39, 44-45 Syria, importance in history of glass, 122-123 Syria, glass made during Frankish occupation in coast towns, 180-181 Syrian glass of Middle Ages, 118, 148-149 Syrian glass-workers in Gaul and Rome, 82-83 Syrian tombs, glass from, 59-60 Syrian treatises on alchemy, etc., 122-124 Syrian manufacture of glass vessels, 123-124 Syrian glass-furnace described, 124 Tassie, James, his glass paste, 336 Tell-el-Amarna, glass from, 22, 23-25 Theophilus, his _Schedula Diversarum Artium_, 126-130 Theophilus on gilt glass, 92-93 Theophilus, his glass furnace, 127-128 Theophilus, materials for glass-making, 128 Theophilus, blowing of glass, 128-129 Theophilus, the ‘cylinder process,’ 128-129 Theophilus on enamelling of glass vessels, 130 Theophrastus on the word _Kyanos_, 35