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Page 



Sulphate of ammoniac* 102 



baryte, . 108 



copper, 75, 145 



iron, . . 73 



of lead, » 142 



* lime, 62, 106 



* magnefia, 55 



potalh, 50, 99 



foda, 48, 100 



zinc, 7$> l 55 



Sulphites, . . 98 

 Sulphur, . . 169 



common, 170 



volcanic, 170 



Sulphures, . . . 97 

 Sulphuret of antimony, 1 56 



arfenic, 151 



bifmuth, 149 



copper, 1 45 



tin, . 148 



Sulphuric acid, . 97 

 Sulphurifed bifmuth, 149 



tin, 148 



zinc, 155 



Sylvanite, . . 161 

 Sympathetic ink, 153 

 Swallows, when fir ft feen, 190 



Tabanus,' « n. 6 



Tafa, . . 172 



Talc, . . 109 



Taicite, . • 109 



Talcoffe argillite, I30 

 Tallow mineral, 169 

 T^tack, a fpecies of grafs, 195 

 Tea feeds to prefer ve, 27 

 Tek, what fpecies of wood, 195 

 Tellurium, . 106, 162 

 Tenebrio, . . n. 3 

 Terra lemnia, . 114 

 Terrafs, . .172 



Thumerflein, . 120 

 Tigers, . .189 



H 



Page 



Tin, . . 136, 148 



Tin, brown tin-ftone, 148 



pyrites, . 148 



ftream, or Cornim ore of, 



148 



fulphuret of, 148 



Tipula, . . n. 6 



Titanite, * 136, 161 

 Topaz, . . 11H 



Tortoifes, to defcribe, xii 



preferve, 21 



Tourmalin, . 1 20 



Trade, queries refpe&ing, 181 

 Trap, . .116 



with hornblende, 1 3 1 



krag, 1 3 1 



mullen, 131 



Trafs, . • J 72 



Tripoli, . .114 



Tfai, an Indian plant for dye- 

 ing, . .196 

 Tunftate, . 158 



of lime, 158 



Tungftein, . " 136, 158 



Uranite, . 136, 159 



• •• calciform of, 159 



f carbonate of, 159 



oxyde of, 159 



fpathofe, 159 



fulphuret of, 160 



Uranium, . • 159 



Vedam, a facred book of the 

 Bramins, . 178 



Vegetable alkali, 98 



• fixed alkali, 98 



Venetian talc, . 109 

 Vefpa, • . ti, 6 



Vefuvian, # 120 



Violet fchorl, . 1 20 

 Vital air, . . 82 



Vitiated air, . 8£ 



Vitreous 



