Geology and Natural History. 83 



8. Das Salz, dessen Vbrkommen und Verwertimg in Sdmt- 

 lichen Staaten der JErde • verfasst von J. Ottokae Feeiherrn 

 Buschman. I Band. Europa. Pp. xiv, 768. Herausgegeben mit 

 Untersttitzung der K. Akademie der Wissenschaften in Wien aus 

 der Treitl-Stiftung. Leipzig, 1909 (W. Engelmann). — The second 

 volume of this exhaustive work on Salt was published two years 

 since (see volume xxiii, p. 153), and was devoted to the various 

 countries in the world outside of Europe. The present ponder- 

 ous volume of nearly 800 large octavo pages is given to Europe, 

 and presents the facts with the same degree of thoroughness and 

 minuteness. The work is divided geographically according to 

 countries, beginning with Russia, after which follow Germany, 

 Austria-Hungary, Great Britain, Prance, Italy, etc. In each case 

 the same general heads are adopted, under which the multitude 

 of facts presented are arranged, viz. : The occurrence and exploita- 

 tion of salt ; the amount of import and export ; the salt trade and 

 the use of salt. Numerous references to the literature open each 

 division of the work, and many explanatory foot-notes accompany 

 the text, adding to the completeness of the work as a whole. 



9. Brief Notices of some Recently Described Minerals. — 

 Delorenzite is a titanate of yttrium, uranyl, tin and iron, per- 

 haps related to polycrase. It is described by Zambonini as occur- 

 ring in the pegmatite of Craveggia in Piedmont, sometimes 

 associated with striiverite. Its crystallization is orthorhombic, 

 the crystals being slender, of prismatic habit ; hardness 5*5-6 ; 

 specific gravity 4*7 ; luster resinous ; color black, in thin splinters 

 chestnut-brown. An analysis by Sterba gave : 



Ti0 2 66-03 Sn0 2 433 U0 2 9-87 Y 2 3 14-63 FeO 4-25=9911 



From the above the formula 2FeO.U0 2 .2Y 2 3 .24Ti0 2 is calcu- 

 lated. — Zeitschr. Kryst., xlv, 76, I 908. 



Georgiadesite is a chloro-arsenate of lead, described by Gau- 

 bert as occurring with other secondary lead minerals at the 

 ancient mines of Laurion, Greece. Crystallization orthorhombic, 

 crystals small, of short prismatic habit and hexagonal in aspect, 

 with m(110), 5(010), e(011), angle bm = 60°1'; hardness 3*5 ; spe- 

 cific gravity 7'1 ; luster resinous ; color white to brownish-yellow. 

 An analysis gave : 



Asa0 5 12-49 PbO 38-86 Pb 36-38 CI 12-47 = 100-20. 

 This is interpreted as Pb 3 (As0 4 ) a .3PCl 2 , which brings it near 

 mimetite. Named after M. Georgiades, Director of mines at 

 Laurion. — Bull. Soc. Min., xxxi, 86, 1908. 



Taramellite is a silicate of iron and barium, described by E. 

 Tacconi from the granular crystalline limestone of Candoglia, 

 Valle del Toce, Italy. It forms columnar or radiated fibrous 

 aggregates of a brownish-red color; hardness 5*5 ; specific gravity 

 3-92. An analysis gave : 



Si0 2 36-56 Fe 2 3 21-54 FeO 4 ; 47 BaO 37-32=99-89. 

 The formula deduced is 4BaO.FeO.2Fe o O 3 .10SiO 2 . The mineral 

 is named for Prof. T. Taramelli. — Centralbl. Min., 506, 1908. 



