31] 



VOLUMES XXXI-XL. 



535 



Minerals — 



cal characters, iv, 391 ; Bakersville, 

 N. C, vi, 222, 324. Ohvenite, v, 

 298. Oolite, calcareous, Iowa ; sili- 

 ceous, Penn., xl, 246. Opal, Oregon, 

 viii, 73. Ore-deposits, theory of, i, 

 4.74. Orthoclase, iii, 243. 



Pandermite, iv, 234. Paposite, vii, 

 501. Pectolite, iii, 287. Periclasite, 

 Sweden, iv, 490. Perofskite in 

 peridotite, Ky., vii, 219; in serpen- 

 tine, iv, 140; Magnet Cove, xl, 403. 

 Phenacite from Colorado, ii, 210, iii, 

 130, vi, 320; New Hampshire, vi, 

 222, 472; new localities, ix, 325; 

 not found at Hebron, Me., Yeates, 

 xl, 259; of Mt. Antero, Col., Pen- 

 field, xl, 491. Phlogopite, N. Y., 

 vi, 329; composition, Clarke, viii, 

 389. Pholidolite, xl, 335. Phos- 

 phosiderite, xl, 336. Picrophar- 

 macolite, Mo., xl, 204. Pinnoite, i. 

 230. Pitticite, Utah, xl, 205. Plat- 

 inum, native, Canada, v, 257. Platt- 

 nerite, Idaho, Wheeler; viii, 79; 

 Hawkins, viii, 165. Pleonectite, 

 Sweden, viii, 251. Pleurasite, Swe- 

 den,- ix, 161. Plumbonacnte, Swe- 

 den, viii, 250. Polianite, v, 243. 

 Polyarsenite, i, 230. Polybasite, i, 

 229; Colorado, xl, 424. Polycrase 

 in N. and S. Carolina, ix, 302. Po- 

 lydimite, Canada, vii, 372. Priceite, 

 iv, 283. Pseudobiotite, iv, 73. 

 Pseudo-chrysolite, i, 75. Psilome- 

 lane, formation, vi, 175. Ptilolite, 

 ii, 117. Pyrite, Col., crystals, vii, 

 236; Pa., vii, 209; decomposition 

 of, vi, 295 ; French Creek, Penn., 

 xl, 114. Pyroxene, hemihedrism of, 

 Williams, viii, 115 ; N. Y., vii, 237 ; 

 secondary, ix, 359; twin crystals, 

 iv, 275. 



Quartz, iii, 507 ; with basal plane, ii, 

 208; compound crystals, i, 74 • 

 Arizona, iv, 479 ; electric dilatation, 

 vii, 495: etching, vii, 501; as an 

 insulator, Boys, viii, 76; origin of, 

 in basalt, Iddings, vi, 208; pseudo- 

 morphs after spodumene, vi, 222; 

 twin crystals, vi, 323. Quenstedtite, 

 vi, 156. Quetenite, xl, 259. 



Ealstonite, composition, ii, 380. Ra- 

 phisiderite, ix, 74. Reddingite, 

 Branchville, Ct., ix, 211. Redding- 

 tonite, Cal, ix, 73. Rhaetizite, Pat- 

 rick Co., Va., ix, 49. Rhodochro- 

 site, Col., iv, 477; N. J., xl, 375. 

 Rhodonite, N. J., xl, 484. Rhodo- 

 tilite, vii, 499. Riebeckite, vi, 391. 

 Roemerite, from Chili, viii, 243. 



Minerals — 



Rosenbuschite, v, 416. Rubrite, xl, 

 258. Rumpfite, Styria, xl, 424. 

 Rutile, iii, 161. 501. Rutile-Edi- 

 sonite, ix, 159. 

 Sanguinite, Chili, xl, 497. Sanidine, 

 i, 434. Sarkinite, i, 230. Scapo- 

 lite, Pa., xl, 116; in rocks, N. J., 

 ix, 407. Scheelite from Idaho, vii, 

 414. Schorlomite, iii, 425. Schun- 

 gite, iii, 424. Scorodite, iii, 290; 

 iv, 171. Seleu-tellurium, Honduras, 

 xl, 79. Serpentine, composition, xl, 

 307 ; formations in California, i, 

 348; Montville, N. J., vii, 237; 

 Syracuse, iv, 137. Siderite, N. Y., 

 xl, 155. Siderona trite, Chili, xl, 

 201. Siderophyllite, Clarke, viii, 

 390. Sigterite, xl, 336. Silicates, 

 formulas, Becker, viii, 154; consti- 

 tution of, Clarke and Schneider, xi, 

 303, 405, 452. Silver nugget, iv, 

 480; in volcanic ash, iv, 159. So- 

 dalite, i, 264. Spangolite, ix, 370. 

 Spessartite, i, 434. Sperrylite, anal., 

 vii, 67; crystalline form, vii, 71. 

 Sphalerite, amorphous, Kansas, xl, 



160. Spodumene, Hidden, ii, 204. 

 G-. vom Hath, iii, 1 60. Strengite, arti- 

 ficial, i, 311. Stibiatil, Sweden, ix, 



161. Stibnite, vii, 501 ; xl, 115. 

 Stromeyerite, iii, 79. Stiivenite, iii, 

 80. Sulphantimonites, Col., Eakins, 

 vi, 450. Sulphohalite, vi, 463. Sul- 

 phur, Dana, ii, 389. Sussexite, N. 

 J., anal., vi, 323. 



Talc, composition, xl, 306. Tamaru- 

 gite, xl, 258. Tephrowillemite, N. 

 J., Koenig, viii, 329. Tetradymite, 

 Arizona, xl, 114. Tetrahedrite, i, 

 229. Thenardite, Verde Valley, 

 Arizona, ix, 44; Cal., vii, 235. 

 Thoro-gummite, viii, 480. Topaz, 

 Mexico, iii, 507 ; in rhyolite, i, 432 ; 

 of Utah, iii, 146. Tourmaline, iii, 

 160, 506; analysis and composition 

 of, v, 35; black, N. C, ii, 205; 

 brown, N. Y., vii, 237 ; locality in 

 Maine, i, 75. Trona, see Urao. 

 Turquois, New Mexico, ii, 211. 

 Tyrolite, v, 300; Utah, ix, 271. 



Uintahite, i, 231. Ulexite, anal., iv, 

 264. Uraninite, iv, 73; vi, 295; 

 composition of, Hillebrand, viii, 329, 

 495 ; xl, 384. Urao, anal., viii, 

 59 ; (Trona), crystallization, viii, 

 65. Utahite (?), New Mexico, xl, 

 203. 



Vanadinite, i, 230; Arizona and New 

 Mexico, ii, 441. Vermiculite, ii, 

 375. Vermiculites, composition, xl, 



