848 SEC. 16. GEOLOGY AND MINING. 



3309. Sections of Typical Basalts (30 specimens), a selec- 

 tion by Prof. H. Mohl, Cassel ; with a commentary. 



R. Fuess, Berlin. 



3310. Sections of Bock-forming Minerals (30 specimens), 

 a selection by Prof. H. Rosenbusch, Strasburg; with a commen- 

 tary. R. Fuess, Berlin. 



3311. Sections of the Bocks of the Kaiserstuhl (30 



specimens), a selection by Prof. H. Rosenbusch, Strasburg. 



R. Fuess, Berlin. 



3312. Sections of the Eruptive Bocks of Hungary and 

 Servia (30 specimens), a selection by Prof. Szabo, Budapest; 

 with a commentary. R. Fuess, Berlin. 



3313. Sections of Typical Bocks (30 specimens), a selection 

 by Prof. F. Zirkel, Leipsic ; with a commentary. 



R. Fuess, Berlin. 



3314. Sections of the most Characteristic Bocks of the 



Huronian iron region, Lake Superior, U.S.A. (30 specimens), a 

 selection by Major T. B. Brooks, Wisconsin Geological Survey, 

 and microscopically examined by Dr. Wichmann, Leipsic. 



R. Fuess, Berlin. 



3315. Collection of Thin Sections of all the rocks occurring 

 in the Fichtelgebirge. 



Geological Survey of Bavaria (Dr. Gumbel). 



The collection of thin sections illustrates the method of collecting and 



examining, large numbers of slices from the same rock and locality being 



prepared. The accompanying plate shows sections of a few of the most 



important of these rocks magnified and printed in colours. 



3316. Pictures of the most important of these Rocks, as 

 drawn from sections under the microscope. 



Geological Survey of Bavaria (Dr. Gumbel). 



3317. Collection of Hand Specimens of Typical Ter- 

 tiary Basalts and altered enclosures (68 specimens), illustrated 

 by one hundred thin sections. 



Mineralogical and Geological Cabinet of the School of 

 Industry, Cassel (Dr. H Mohl). 



The classification ? of the Basalts is that begun by Prof. F. Zirkel, and 

 extended by the exhibitor, as illustrated in Paper No. I. Special descriptions 

 of these rocks and their structure will be found in the Papers 1I.-VIL, the 

 figures being contained in Paper X. 



3318. Collection of Hand Specimens of Typical Phono- 

 lites and nearly related Andesites (38 specimens), illustrated by 

 seventy thin sections. 



Mineralogical and Geological Cabinet of the School of 

 Industry, Cassel (Dr. H. Mohl). 



