MINERALOGY. 70? 



Natkolite. From Steinpel, uear Marbnrg, crystallographic exauiiuatioii, Stadtliindftr, 



Jahrb. Min., 1885, ii, 113. 

 Nepaulite. India, shown to be tetrahedrite, F. R. Mallet, Records Geol, Siirv. India, 



XVIII, '235. 

 Nephelite. Results of accurate measurements, v. Kokscharow, Min. Rnsslands, ix, 



247. 

 Nephrite. Jordansmiibl, Silesia, occurrence and composition, Traube, Jahrb. Min. 



Beil.-Bd., Ill, 412; ib., 1885, ii, 91; see also Kenngott, ib., i, 23?. 



Tasmania, analysis, Bodewig, Zs. Kr,, x, 86. 

 NoCERiNE. Chemical investigation, E. Fischer, Zs. Kr., x, 270. 



OcTAHEDEiTE, Binneuthal, Switzerland, crystal examined, Ces^ro, Bull. Soc. Min., 

 VIII, 396. 

 Crystal from near Oberhof, Thurii^ia, Luedecke, Zs. Kr., x, 200. 

 Occurrence in Dauphiny, Groth, Ber. Ak. Miinchen, Nov. 7, p. ;?96. 

 Oligoclasi;. Optical examination, Des Cloizeaux and Pisaui, Bull. Soc. Min., 



VIII, 6. 

 Olivine. See Chrysolite. 

 Orthite. See Allanite. 



Orthoclase. Var. Adular, crystals with new planes, Cathrein, Zs. Kr., xi, 113. 

 Composite crystal, Zs. Kr., x, 489. 



Var. Sauidine, comparison of measurements by himself and by Striiver, v. Koks- 

 charow, Min. Russlands, ix, 252. 

 Crystals in druses in basalt, Zepharovich, Zs. Kr., x, 601 ; Ber. Ak. Wien, xci, 158. 

 Twin crystals from Four-la-Brouque, Puy de DOme, Gonnard, Bull. Soc. Min., viii, 



307. 

 Chester County, Pennsylvania, analysis, Genth, Am. Phil. Soc. Philad., Oct. 2. 

 Pseudomorph after leucite, Vesuvius, Scacchi Rend. Ace. Sc. Napoli, December; 

 from the Erzgebirge, Zs. Geol. Ges., xxxvii, 456. 



Parisite. Note on a large crystal, G. de Grandmaison, Min. Mag., vi, 123. 

 Pectolite. Lehigh County, Pennsylvania, analysis, Knerr and E. F. Smith, Am. 



eh. J., VI, 411. 

 Perofskite. From the Wiesenthal, Erzgebirge, Sauer, Zs. geol. Ges., xxxvii, 445. 

 Phenacite. Crystals from El Paso County, Colorado, W. E. Hidden, Am. J. Sc, 



XXIX, 249. 

 Prehnite. Occurrence in the Erzgebirge, Schalch, Jahrb. Min., Beil.-Bd., iv, 179. 

 Phillipsite. From Stempel, near Marburg, crystallographic description, Stadtliinder, 



Jahrb. Min., 1885, II, 122. 

 Phlogopite. Templeton, Canada, inclusions studied, Lacroix, Bull. Soc. Min., viii, 99. 

 Pinnoite. New borate from Stassfurt, Stante, Ber. d. chem. Ges., xvii, 1584, 1884. 

 Plumbocalcite. Examination of crystals from Scotland, Lacroix, Bull. Soc. Min., 



. viii, 35. 

 PoLYARSENiTE. New arseniate of manganese from Sweden, Igelstrom, Bull. Soc. 



Min., viii, 369; the same examined optically, Bertrand, ib., p. 374. 

 POLYBASiTE. Terrible Lode, Clear Creek County, Colorado, analysis, Genth, Am. 



Phil. Soc, Philad., Oct. 2. 

 Priceite. See Colemanite. 



Proustite. Crj'st. monograph, Rethwisch, Jahrb. Min., Beil.-Bd., rv, 31. 

 P YR ARGTf rite. Cryst. monograph, Rethwisch, Jahrb. Min., Beil.-Bd., iv., 31. 

 Pyrite. Crystallographic and thermo-electric characters. Curie, Bull. Soc. Min., 



VIII, 127. 

 Crystals from Dauphiny, Groth, Ber. Ak. Miinchen Nov. 7, p. 378. 

 Formation artificially, Doelter, Zs. Kr., xi, 30. 



