428 TABLE I. FOR DETERMINATION OP MINERALS. 



FoL Tellurium, 



Gray antimony, 222. 20 



Vitreous silver, 

 Native tellurium, 



Brittle silver, 



Native bismuth, 



Vitreous copper, 



Galena, 



Amalgam, 

 Native antimony, 

 Native arsenic, 



Hardness. 

 280. 10— 1-5 H ; fol ! gran ; G 7—7-1 ; bkh lead-gy , lam flex 



sectile ; nit sol ! Bl, on char, w fumes, flame l\ 



Prim. 

 Ill; cleav; col, div ; G 4-5 — 4-7 ; lead-gy, steel-gy j 



tarnishes ; lam subflex : Bl, fus 1 1 on char sulph 



odor and wholly volat. Prim. 

 325. 2-0—2-5 I ; mas, retic ; G 7-1—7-4 ; bkh lead-gy ; nit sol : 



Bl, fus ! ! intum, glob of silver. Silver ores. 

 VI ; mas ; G 5-7—6-1 ; tin-w, rather brittle : B{ 



fus ! ! On char gnh flame, w inodorous fumes, 



wholly volat Prim. 

 Ill ; mas ; G 6-2 — 63 ; iron-bk; sectile ; hot nil sol: 



Bl, fus I ! sulph and antim fumes ; on char, glob 



of silver. Silver ores. 

 I; mas, cleav! G 9 7 — 9-8; silver- w, rdh; nil sol, 



and solution w if diluted : BU fus ! ! volat, inod ; 



yw on char. Prim. 

 292. 2-5—3-0 HI ; mas ; G 5-5—5-8 ; bkh, lead-gy ; nit sol, and 



polished iron put in the solution covered* with 



copper: Bl, fus ! on char sulph fumes. Prim, strat. 

 277. 2-5—3-0 I; cleav! mas; G 7-5—7-7; pure lead-gy; rather 



sectile : Bl, fus ! decrep ; on char sulph fumes 



and glob of lead. Prim, strat. 

 287. 20—3-5 I; mas; G 105— 14; silver-w ; nit sol: Bl, fumes 



of mercury, and silver glob. 

 ,222 30—3-5 VI ; cleav ; lam, mas ; G 6-6—6-8 ; tin-w: Bl, fus ! ! 



volat ; on char w fumes. Prim. 

 225. 3-5 VI ; mas ; G 5-6— 58 ; tin-w, lead-gy, darker from 



tarnish; brittle: Bl, wholly volat, garlic odor. 



219. 



220. 



Gray copper, 295. 30 — 4-0 I ; tetrahed ; mas ; G 4-7 — 51 ; steel-gy to iron-bk : 

 Bl, fus ! ! arsen and antim fumes ; copper reac- 

 tion. Prim, copper ores. 



White nickel, 263. 5-0—5-5 I ; mas; G 7-1— 7 2 ; tin-w : Bl, arsen fumes ; also 

 nickel reaction. Prim. 



In determining the name of a mineral by the preceding 

 table, trials should be made of the hardness and of the other 

 characters upon which the arrangement is based, as shown 

 in the general view on page 188. The particular subdi- 

 vision containing the species is thus arrived at, and also, by 

 means of the hardness, the place of the species in the sub- 

 division. Afterwards, by a comparison of the other charac- 

 ters, (specific gravity, color, etc.,) with the brief descriptions 

 given in the table, the name of the mineral will be ascer- 

 tained. If any doubt still remains, the fuller descriptions in 

 the body of the work may be referred to, for the convenience 

 of which reference, the page is added for each species. 



