Geology and Mineralogy. 



12. Sammlung von Mlkrophotographien zur Verannchau, 

 vug (Itr inikrosho], :.•«■/<<, i strn>-tur ,'.<,, i Mhu rtilien und Gest 

 ausgewahlt von E. Coinc*. auftrcnoinnicn von J. (irimin in O 

 hurg. Stuttgart, 1881-82 (E. Schweizerbart'sche Verlagsh: 

 lung).— This work consists of 



:.. ■.,;,■ 



s of miner 





% the inclosures in minerals, as crystallites, microlitt 

 (•Insure-, inclosures of rluids and gases; showing al: 

 angement in crystals; cleavage ; all "the varieties of stru 

 •ous. z,u,al, com retionary, etc.; the figures produced! 

 pressure; also various optical phenoi 

 m. The execution 

 Dr. Cohen deserv 



' liydrated silicate of nickel and magnesia 1 



