I. GEOLOGY. 715 



3301. Collections of Bock Specimens. 



Bernhard Sturtz, Bonn. 



3302. Collection of Fossils. Bernhard Sturtz, Bonn. 



3303. Collection of Specimens of Lodes. 



Bernhard Sturtz, Bonn. 



3304. Slabs with Fossils. Bernhard Stiirtz, Bonn. 



3305. Glass Model of the barren part of the " Flotz " of the 

 coal basin of the Wurm Mining district, Aix-la-Chapelle. 



United Coal Mining Co., Aix-la-Chapelle (Director Hilt). 



* 3306. Transverse Section through the barren "Flotz" of 

 the coal basin of the Wurm. 



United Coal Mining Co., Aix-la-Chapelle (Director Hilt}. 



3307. Sections of Typical Bocks (30 specimens), a selec- 

 tion of Prof. J. Roth, Berlin ; with a commentary by Prof. H. 

 Rosenbusch, Strasburg. R. Fuess, Berlin. 



3308. Sections of Typical Bocks (30 specimens), with a 

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



R. Fuess, Berlin. 



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 Kaiser stuhl (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.>.A. (30 specimens), a 

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

 and microscopically examined by Dr. Wichinann, Leipsic. 



R. Fuess, Berlin 



