MINERALOGY. 



By Prof. Edward S. Dana, 



Tale Colleac, Keiv Havtn, Covn. 



GENERAl. WORKS ON MINERAL,OGY. 



The list of mi nera logical works published in 1885 includes a new 

 edition of '^ ann > ami' s Element e dcr Miner aloflie.* This is the twelfth 

 edition of the work, and, like the tenth, issued in 1877, and the eleventh, 

 ill 1881, has been edited by Proiessoi- Zirkel, of Leipzig-. Jt includes the 

 numerous additions of the jiast four years, and since theu the whole 

 matter has been thoroughly worked over. While not aiming at exhaust- 

 ive completeness, it yet gives mudi more than any other treatise in 

 the German language, and is a decided advance upon j^revious editions 

 of the work. The Lehrbuch der Mineralogie of Tschermak, the first edi- 

 tion of which was noticed in the report for 1883, has appeared in a sec- 

 ond edition, with some minor additions and corrections. Increased 

 acquaintance with the work brings a higher appreciation of its excel- 

 lence, more especially as regards its treatment of subjects in physical 

 mineralogy. The veteran JRussian mineralogist, N. v. Kokscharow, con- 

 tinues his labors with nnremitting activity. The product of the past 

 year is an additional portion of the ninth volume of the Materialien zur 

 Mineralogie Russlands, covering images 81 to 272, and giving a general 

 description of the species turquois, and supplementary chapters ou 

 topaz, vesuviauite, nephelite, orthoclase (sanidine) and liiiarite, 



A new edition of Grotli's Physilcalifiche Krystallographie has been pub- 

 lished, with a very large amount of new nmtter, increasing the size of 

 the volume nearly one-half. The additions are largely in the chapters 

 devoted lo the methods and instruments employed in the study of the 

 l)hysical characters of minerals, which are treated with a fullness that 

 leaves nothing to be desired. The work is comprehensive throughout 

 and only to be compared with Mallard's Traitc de Cri)itaUonraphie,uol'n^ed 

 in the report for 1884, which, however, occupies a somewhat dilierent 

 Held. Rosenbusch has completed a new edition of his invaluable Milro- 

 akopische Pkysiographie der petrographisoh wichtigen Mineralicn, largely 

 increased in size and improved in every waj'. The work is unrivalled 



• J\)r fiiU titleH of works mentioned, see ibe Bibliography at the close of the chai»t»ir, 



