470 RECORD or SCIENCE FOR 1886. 



Tellurite. Faczebaja, crystals described, Breziua. Ann. Mus. Wien,i, 136. 

 TiCTKAiiKDKiTE. Pulacajo uiiue, lliuiuchaca. Bolivia, crystals described, A'om Rath, 



Ber. uied. Gcs. Bonn, June 7. 

 Thomsonitk. Scoulerite, microscopic examination, Lacroix, Bull. Soc. Min., ix,80. 

 TiTANiTE. Xordmark, crystals described, G. Flink, Bihang Vet. Akad. Handl., xil, 



1-2, G9. 

 Topaz. Dnrango, Mexico, crystals described, with numerous new planes, Des Cloi- 

 zeaux. Bull. Soc. Min., ix, 135. 

 Ural, indices of refraction measured, Ramsay, Zs. Kr., xii, 209. 

 Brazil, pyroelcctrical experiments. Mack, Wied. Ann., xxviii, 153. 

 Investigation of inclusions, Nordenskiold, Jb. Min., i, 242. 

 Nathrop, Colorado, occurrence in lithoiihyses of rhyolite, W. Cross, Am. J. Sc, 



XXXI, 432. 

 Occurrence with tin, deposits of Mount Bischof, Tasmania, described, Groddeck, 

 Zs. G. Ges., XXXVIII, 370. 

 TouiuiAHNE. Pierrepout, New York, crystals described, vom Rath, Ber. uied. Ges. 

 Bonn, July 7. 

 Alexander County, North Carolina, crystallographic note, W. E. Hidden, Am. 



J. Sc, XXXII, 200; vom Rath, Ber. nied. Ges. Bonn, February 8. 

 Electrical experiments, Schedtler^ Jb. Min., Beil.-Bd., iv, 519. 

 Tridymite. Twin crystals discussed, vom Rath, Ber. nied. Ges. Bonn, July 7. 

 Turquoise. New Mexico, chemical and microscopic examination, F. W. Clarke and 



J. S. Diller, Am. J. Sc, xxxir, 211. 

 Urvolgvite (Herrengrundite). Sandberg, Hungary, occurrence described, Szabo, 



Zs. Kr., x,,267. 

 Vanabinite. Arizona and New Mexico, crystals described, S. L. Penfleld, Am. J. Sc, 



xxxii, 441 ; occurrence, .T. C. Cooper, Washburn Coll. Bulletin, i, 1G9. 

 Variscite. Arkansas, optical characters, Lacroix, Bull. Soc. Min., ix, 5. 

 Vermiculite. See Lucasite and Muscovite. 



Vesuvianite. Zermatt, association with garnet, Lewis, Min. Mag., vii, 9. 

 Composition discussed, Rammelsberg, Zs. Geol. Ges., xxxviii, 507. 

 Jacobsberg, Sweden, analysis showing the presence of 4.7 per cent, of MuO., 



Igelstrom, Bull. Soc. Min., ix, 22. 

 Var. mangan-vesuvianiU, crystals described, with analysis, G. Flink, Bihang Vet. 

 Akad. Handl., xii, 2, 57. 

 ViviANiTE. Artificial crystals studied, CesJiro, Ann. Soc. G6ol. Belg.,M6m., xiii, 21. 

 Yuba County, California, crystals described, A.W.Jackson, Proc. Cal. Acad. Sc, 

 No. 4, 370. 

 Waluewite. See Xanthopiiyllite. 

 Warwickitk. Edenville, New York, optical examination, Lacroix, Bull. Soc. Min., 



IX, 74. 

 Wavellite. optical characters, Lacroix, Bull. Soc. Min., ix, 4. 

 Wehrllte. Deutsch-Pilseu, analysis, Sipiicz, Zs. Kr., xi, 212. 



Wiiewellite. Burgk, near Dresden, crystals described, Weisbach, Jb. Berg- Hiitt. 

 WiTHAMiTE. Scotland, optical examination, Lacroix, Bull. Soc Min., ix, 75. 

 Wolframite. Sierra Almagrera, crystals described, Seligmaun, Zs. Kr., xi, 347 



Felsobiinya, analysis, Sipiicz, Zs. Kr., xi, 211. 

 WoLLASTONiTE. An artificial mineral of the composition CaSiOa, Doelter, Jb. Min., 



I, 119. 

 WULFENITE. Yuma County, Arizona, occurrence, J. C. Cooper, Washburn Coll. Bul- 

 letin, I, 169. 

 Xantiiolite. Scotland, optical examination showing identity with staurolite, La- 

 croix, Bull. Soc. Min., ix, 78. 

 Xantiiopiiyllite. Var. waluewite, exact determination of crystalline form and anal' 

 ysis, N. von Kokscharow, Min. Russlaud, ix, 273. 



