NATURAL HISTORY MUSEUMS 137 



mollusks, originally exhibited at the Crystal palace exhibition 

 in 1851, and afterward bought for the military academy. The 

 collection of recent mollusks is quite full and the collection of 

 modern corals, fair. 



In the Mesozoic collection there are 112 fossil forms from the 

 Solenhofen limestone, and 200 plant leaves from the Dakota 

 Cretaceous, both typical and excellent. 



Mineralogy. 4563 specimens. A fairly full assortment of the 

 or^s of the common metals, of the varieties of silica (quartz) 

 and the various silicates and calcareous minerals — no particular 

 locality. Groups best represented are the ores of the metals 

 and quartz. 



Lithology. 644 specimens. Nearly all the species of the plu- 

 tonic, metamorphic and volcanic rocks, together with many 

 of the sedimentary rocks, including some fine marbles. A fine 

 collection of the rocks of New England (250 specimens). An 

 educational series of rocks from the United States geological 

 survey, (156 specimens). 



Ethnology and anthropology. Small number of implements of 

 the Stone Age, and a small number of specimens of Indian 

 pottery (Pueblo). 



The museum also contains about 1200 unique or rare minerals, 

 rocks and fossils not mentioned above including some large am- 

 monites in section; some fine specimens of elephants' and masto- 

 dons' teeth, (Quaternary); a vertical section of the Coal Meas- 

 ures of Pennsylvania, with description; a vertical section of the 

 Pennsylvania oil sands, with specimens of the sands and oils 

 from different levels; plaster cast of American continents, with 

 parts of Europe and Africa, and the bed of the Atlantic ocean; 

 three exhibit collections of minerals, rocks and fossils for daily 

 section room use, 1000 specimens each; a working collection 

 of minerals, rocks and fossils for the same purpose, of 45,000 

 specimens (estimated from partial count). The cabinet also con- 

 tains a set of crystal models, in glass and pasteboard (150). 



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