%2ti TABLE I. FOB DETERMINATION OF MINERALS. 



Wolfram, 



Chromic iron, 241 



Pitchblende, 

 Psilomelane, 



Columbite, 243. 



Yenite, 



Specular iron, 



Magnetic iron, 235, 

 Franklinite, 240. 



Hardness. 

 239 5-0 — 5 5 mam, bot, stalact, mas ; G 3-9 — 4; bn, bkh; Stywb 

 bn ; strp, op ; no action on magnet : Bl, infus. 

 bk and magnetic. 



244. 5-0— 5-5 III ; mas ; col, lam , G 7-1—7-4 ; gyh-bk, bnh-bk ; 

 St dark rdh-bn ; submet : Bl fus ! de.crep, bot 

 gn bead. Prim. 



I; mas; G 4 3 — 4-5; iron bk, rather dull, brittle , 

 St bn ; often slightly magnetic : Bl, infus ; bor 

 fine gn, fus dif. Serpentine. 



228. 5-5 Mas, bot; G 647 ; bnh-bk, velvet-bk ; St, bk ; sub- 



met ; nit slow sol : Bl, bor gray scoria. Prim. 



259. 5-0—6-0 Mas, bot; G 4 — 4 4 ; bh, gyh to dark steel gy; St 

 bnh-bk, shining; brittle : Bl, infus, bor violet. 

 Manganese ores. 

 Ill; mas; G 5-9—61; bnh-bk, bk, often with a 

 steel blue tarnish ; St dark rdh-bn, bnh-bk ; sub- 

 ,met: Bl. infus, bor fus dif. Prim. 



245. 5-5—6-0 III; mas, col; G 3-8— 4-1 ; iron bk, bnh; St gnh, 

 bnh ; submet ; brittle : Bl, fus ; bor bk mag 

 glob. Prim. 



218. 5-5—6-5 VI ; mas ; G 4o-r5-3 ; iron-bk andcryst brilliant; 

 St r, rdh-bn : Bl infus, bor iron reaction, glob 

 finally mag. Prim, strat, vole. 



I ; mas ; G 5 — 5-1 ; iron-bk ; St bk ; strongly mag- 

 netic : Bl, infus, bor iron reaction. Prim, strat. 



I; mas; G 4-8 — 5-1; iron-bk; St dark rdh bn; 

 slightly magnetic : Bl, infus ; at high heat zinc 

 fumes. Prim. 



t Fumes before the blowpipe. 



Park red silver, 327. 2-5 



VI ; mas ; G 5-7—5-9 ; iron-bk, lead-gy ; St red ; 

 met-ad : Bl, fus ! I b flame, sulph and antimony 

 ♦ fumes. Silver ores. 



Erubescite, 294. 3-0 I ; mas ; G 5 — 5-1 ; pinchbeck-bn, copper-r, bh tar- 



nish ; St pale gyh-bk ; brittle : Bl, fus ; on char 

 sulph odor, glob mag. Prim, strat, with copper 

 ores. 



Copper pyrites, 292. 3-5—4-0 II ; mas ; G 4—4-2 ; brass yw ; St gnh-bk ; brittle . 

 nit sol, gn : Bl, fus ; on char, sulph odor. Prim, 

 strat, with copper ores. 



Magnetic pyrites, 233. 3-5—4-5 VI; mas; G 4-5 — 4-7; bronze-yw, copper-r; St 

 gyh-bk ; magnetic ; brittle ; dilute nit sol : Bl % 

 fus, sulph odor. 



Leucopyrite, 23b. 5-0 — 5-5 III ; mas ; G 7-2—7-4 ; silver-w, steel-gy ; St gyh- 



bk ; brittle : Bl, fus ; on char, arsen fumes. 



Copper nickei, 263. * VI; mas; G 7-3— 7-7; copper-r; St pale bnh-bk , 

 brittle : Bl, fus ! on char, arsen fumes. Prim 

 usual with cobalt ores 



