888 SEC. 17. MINERALOGY, CRYSTALLOGRAPHY, ETC. 



IL COLLECTIONS OF MINERALS, DIAGRAMS, 



MODELS OF CRYSTALS, &c. 



a. ROCKS AND MINERALS. 



3455. Microscopic Sections of rocks and minerals. 



J. R. Gregory. 



3456. "Explorer's Comparison Mineralogical Cabi- 

 net." /. R. Gregory. 



3457. Hough Gems and Stones, 15 varieties, for com- 

 parison and testing. Thomas J. Downing. 



3458. Specimens of transparent slices of various Minerals 

 for the Microscope. 



Royal Polytechnic School, Delft, Prof. J. Bosscha. 



a. Specimens of minerals described in Prof. Vogelsang's work, " Die 

 Philosophic der Geologic," Bonn, 1867, and depicted on Tables I. and III. 



b. Specimens of crystallites described in "Archives Neerlandaises des 

 Sciences Physiques et Naturelles," and depicted in Table VII. of Vol. V., and 

 Table III. of Vol. VI., and in Prof. Vogelsang's posthumous work, " Die 

 Kristalliten," edited by Prof. F. Zirkel, Bonn, 1875. 



c. Quartz slices with cavities containing fluid carbonic acid. 



3459. Thin Sections of Minerals. 



Ludivig Mo Her, Giessen. 



3460. Collection of rare and remarkable specimens of Zinc 

 Ores from the north of Spain, and from the county Tipperary, 

 Ireland, to illustrate the modes of occurrence and formation of 

 hydrated silicates and carbonates, particularly the oolitic and imi- 

 tative forms. Prof. Jos. P. O'Reilly. 



3461. Photographs (4) of imitative shapes presented by 

 certain hydrated silicates and carbonates of Zinc in the collection 

 from the north of Spain. Prof. Jos. P. O'Reilly. 



3462. Sections or Diagrams illustrative of Zinc Ore de- 

 posits of silver mines, county Tipperary, Ireland. 



Prof. Jos. P. O'Reilly. 



3464. Specimens of Minerals prepared for Observa- 

 tion. 



Case containing minerals and chemical products. 

 Case containing specimen of micrographic rock. 

 Four cubes of different chroites crystals. 

 Rhomboid in Iceland spar. 

 *Section of a diorite. 



M. Wcrlein, Paris. 



3465. Collections of Crystals and Minerals. 



B. Stiirtz, Bonn. 



