472 GENERAL 
Sylvine, Sylvite, 224. 
Syngenite, 227. 
Szaibelyte, 206. 
Tabasheer, 241. 
Tabular spar, 244. 
Tachhydrite, 205. 
Tachyaphaltite, 260. 
Tachylyte, 452. 
Tagilite, 139. 
Tale, 304. 
Talcose schist, 454. 
slate, 441. 
Tantalates, 170, 184, 202, 214. 
Tantalite, 184. 
Tapalpite, 118. 
Tasmanite, 326. 
Teilurate, Bismuth, 102. 
Mercury, 129. 
Telluride, Bismuth, 102. 
Gold, 115, 116, 118. 
Lead, 149. 
Mercury, 129. 
Silver, 118. 
Tellurite, 96. 
Tellurium, Bismuthic, 102. 
Foliated, ». Nagyagite. 

Graphic, 118. 
Native, 96. 
Tellurous acid, 96. 
Tengerite, 203. 
Tennantite, 135. 
Tenorite, 137. 
Tephroite, 256. 
Terenite, 312. 
Teschemacherite, 281. 
Teschenite, 448. 
Tetradymite, 102. 
Tetrahedrite, 121, 135. 
Thenardite, 227. 
Thermonatrite, 230. 

Thomsenolite, 197. 
Thomsonite, 298. 
Thorite, 296. 
Thraulite, 316. 
Thulite, 263 
Thumite, 264. 
Thuringite, 319. 
Tiemannite, 129. 
Tile ore, 187, 160. 
Till, 429. 
Tin, Native, 159. 

Tin ore, Tin stone, 160. 
INDEX. 
| Tin pyrites, 159. 
Tinkal, 227. 
Titanic iron, 178, 456. 
Titanite, 290. 
Titanium, Ores of, 162. 
Tiza, v. Ulexite. 
Tocornalite, 121. 
Tonalyte, 447. 
Topaz, 286. 
False, 235. 
Oriental, 193. 
Topazolite, 258. 
Torbanite, 325, 329. 
Torbernite, 170, 139. 
Touchstone, 237. 
Tourmaline, 282. 
Trachydoleryte, 447. 
Trachyte, 442. 
Tractolyte, 450. 
Trap, 451. 
Traversellite, 295. 
Travertine, 482. 
Tremolite, 249. 
Trichites, 416. 
Triclasite, 315. 
Tridymite, 88, 241. 
Tripestone, 212. 
Triphylite, Triphyline, 184, 190. 
Triplite, 191. 
Triploidite, 191. 
Tripolite, 241. 
Tripolyte, 430. 
Tritomite, 296. 
Trégerite, 171. - 
Troilite, 175. 
Trona, 2380. 
Troostite, 157. 
Tscheffkinite, 203, 291. 
Tschermakite, v. Oligoclase. 
Tschermigite, 198, 231. 
Tufa, Tufte, 428. 
Tufa, Calcareous, 216. 
Tungstate, Copper, 188. 
Tron, 188. 
Lead, 151. 
Lime, 212. 
Tungstic ochre, 97. 
Tungstite, 97. 
| Turgite, 182. 
Turquois, 200. 
Tyrolite, 139. 
Ulexite, 212. 
