708 SCIENTIFIC RECORD FOR 1885 



Pyeoxeni:. Var. diopsidc, Noidruark, Sweden, crystallograpLic aud optical oxaui- 



ination, Fliuk, OetV. Ak. Stockli., XLii, No. 2, 29. 

 Crystal of diopside from Zennatt, Streng, Jahrb. Min., 1885, i, 238. 

 Twin crystals in rocks, Fr. lieckc, Min. petr. Mittb., vii, 98. 

 Relation between optical characters and chemical composition, Doelter, Jahrb. 



Min., 1885, I, 43. 

 Minute crystals in tachylyte, Kronstchoff, Bull. Soc. Min., viii, 85. 

 Augites from the Kaiserstuhlgebirge, analyses, A. Knop, Zs. Kr., x, 58. 

 Var. diallage in gabbro, analyses, etc., Svedmark, Geol. For. Forh., vii, 811. 

 Fusion experiments, Becker, Zs. Geol. Ges., xxxvii, 10. 



Quartz. Remarkable crystals from North Carolina, G. vom Rath, Zs. Kr., x, 156, 475. 

 Composite crystals from Albermarle County, Va., W. G. Brown, Am, J. Sc, xxx, 



191; O. W. Huntington, Proc. Amer. Acad. Sc, June 10, 1885. 

 Effect of pressure on rotatory power, Jannettaz, Bull. Soc. Min., Vlir, 168. 

 Variation of refractive indices with heat, Dufet, ib., 171. 



Rhodonite (Eisenrhodonite) from Wester Silfberg, Sweden, analysis, Weibull. Min. 



petr. Mitth., vii, 117. 



Crystals described from Pajsberg and Langban, Sweden, G. Flink, Oefv. Ak. 

 Stockholm, XLii, 6, 159, June 10. 

 Ripidolite. Var clinochlore, Mussa Alp, composition, Jannasch, Jahrb. Min., i, 92. 

 RuTiLE. Binnenthal, crystallographic examination, Rinne, Jahrb. Min., 1885, it, 20. 



Occurrence in granite, M. von Miklucho-Maclay, Jahrb. Min., 1885, ii, 88. 



Safflorite. Analysis, and relation to smaltite, L. W. McCay, Am. J. Sc, xxix, 



369, 496. 

 Sarkinite. New manganese arseniate from Pajsberg, A. Sjogren, Geol. For. Fiirh., 



vii. 724. 

 Scapolite. Composition of group discussed, Rammelsberg, Ber. Ak. Berlin, xxx, 



589. 

 ScoLEZiTE. Pyroelectricity described, C. Friedel and A. de Gramont, Bull. Soc. Min., 



VIII, 75. 

 Serpentine. Var. chrysotile, Shipton, Canada, analysis, E. G. Smith, Am. J. Sc, 



XXIX, 32 ; do. Terrell, Bull. Soc. Chim., XLlli, 217. 

 Penn., Keller, Am. Phil. Soc, Philad., Oct. 2. 

 SiLFBERGiTE. From Wester Silfberg, Sweden, analysis, Weibull, Min. petr. Mitth., 



VII, 115. 

 Silver. Found native in New Jersey, N. H. Darton, Am. J. Sc, xxx, 80. 

 Spinel. Etching figures, F. Becke, Min. petr. Mitth., vii, 224. 

 Spodiosite. Relation to wagnerite, A. Sjogren. Geol. For. Forh., vii, 666. 

 Spodumene. Black Hills, Dakota, occurrence of large crystals, W. P. Blake, Am. 



J. Sc, XXIX, 71. 

 Staurolite. Analysis, discussion of composition, W. Friedl, Zs. Kr., x, 360. 

 Stephanite. Description of a crystal from Mexico, G. vom Rath, Zs. Kr., x, 173. 

 Stilbite. Berks County, Pennsylvania, analysis, Davidson ; do,, Hoskinson aud 



Brunner, Am. Ch. J., vi, 414. 

 Stilpnomelane. Antwerp, New York, analysis, Genth, Am. Phil. Soc Philad., Oct. 2. 

 Strontianite. Strontian, Argyllshire, Scotland, analysis. Macadam, Min. Mag., VI, 



173. 

 Strexgite. Artificially produced, A. de Schulten, C. R., June 15. 

 Struvite. Crystals from Homburg, Kalkowsky, Zs. Kr., xi, 1. 

 Svanbergite. Occurrence at Horrsjoberg, Sweden, Igelstrom, Bull. Soc. Min., viii, 



424. 

 Synabelphite. Full description, Hj. Sjogren, Zs. Kr., x, 143. 



