NATURAL HfSTORT MITSFJUMS 189 



Minei^alogy. 34,100 specimens: the Henry collection of 30,000 

 specimens, which is particularly rich in minerals from the zinc 

 and lead region of southwestern Wisconsin; a systematic min- 

 eral collection of 3000; and a systematic collection of crystals 

 numbering 1000; also 100 oriented sections of minerals. 



Economic (jcologi/. A metallurgic collection of 5000 specimens 

 is exhibited. 



Geology and lithology. 26,930 specimens; 13,900 microscopic 

 slides: a set of the Rosenbusch collection of typical rocks, chiefly 

 European, with a number of microscope slides, 550 specimens; 

 600 sections from the type rocks of the Wisconsin geological 

 survey; the Brooks collection of 150 specimens from the Menom- 

 inee region of Michigan; 230 from the Archean formations of 

 Missouri; a general collection of 1000 crystalline rocks; a series 

 of 500 Cambrian and post-Cambrian rocks and relief models to 

 illustrate geologic and topographic features. 



In Science hall, in condition for easy reference, is a large 

 collection of rocks from representative crystalline areas of 

 North America, belonging to the United States geological sur- 

 vey. The collection numbers over 40,000 specimens and 16,000 

 thin sections. Of these, 30,000 specimens and about 12,000 thin 

 sections are of rocks from the Lake Superior region; 3000 speci- 

 mens and 300 thin sections of New England crystallines; and 

 the remainder from other typical crystalline areas of North 

 America. In this building there is also located the following 

 collections; 1500 specimens, chiefly from European localities, 

 and 1000 microscopic slides in the private collection of crystal- 

 line rocks of the professor of mineralogy and petrology; special 

 collections of engineering specimens and the collection of Wis- 

 consin clays and building stones made by the Wisconsin geolog- 

 ical survey. 



Zoology. 50 skeletons and skulls; 80 mounted birds and about 

 100 skins; 100 species of echinoderms; 75 specimens of inverte- 

 brates; 1400 species of shells; 'both Ward's and Blaschka's series 

 of models of invertebrates; and a good set of embryologic mod- 

 els; also good set life histories of insects both alcoholic and 

 dry. 



Botany. 10,000 sheets of phanerogams and vascular crypto- 

 gams from outside the state, and 3000 to 4000 sheets from with- 



