DEPARTMENT OF GEOLOGY 
Halls 34-38, Second Floor 
Hall 34: Systematic Minerals, Meteorites, Physical Geol- 
ogy. — This hall contains minerals, meteorites, and a part of 
a collection illustrating physical geology. In the systematic 
collection of minerals are to be found typical specimens of all 
the important mineral species, about five thousand specimens 
being shown. Many of them are of great beauty, besides pos- 
sessing much scientific interest. The William J. Chalmers 
crystal collection is a valuable feature of this exhibit. The 
meteorite collection contains specimens of nearly all known 
meteorite falls, being in this respect the largest in the world. 
Many of the individual specimens are of unique value and 
interest. An especially large collection of Canyon Diablo 
meteorites is shown. In the portion of the hall devoted to 
collections illustrating physical geology, two large, glaciated 
rocks, other illustrations of glacial phenomena and a great 
variety of concretions may be seen. 
Hall 35: Physical Geology, Lithology, Relief Maps. — Vol- 
canic products, cave formations, fulgurites, dendrites, folded 
and faulted rocks, ripple marks, etc., are among the geological 
phenomena illustrated here. Following these, a systematic 
collection of rocks, numbering about one thousand specimens, 
affords an opportunity for a study of the important varieties 
of the chief constituents of the earth’s crust. In the western 
end of the hall are exhibited about sixty relief maps and 
models showing the topography and structure of selected por- 
tions of the earth’s surface. These include representations of 
well-known scenic areas, such as Yosemite Valley, Niagara 
Falls, the Grand Canyon of the Colorado, the Natural Bridge 
of Virginia, etc., and also illustrate the relief of several 
States and other political divisions. 
Hall 36: Petroleum, Coal, Clays. — In this hall there are 
shown many varieties and products of petroleum, asphalt, 
coal, clays, sands and soils. Both raw materials and products 
are shown. The large variety of products obtained from coal 
tar is quite fully illustrated in one case, and a model of the 
original petroleum refinery built by John D. Rockefeller in 
Cleveland, Ohio, in 1863 is shown. A model of the Chandler 
iron mine, Minnesota, is exhibited in this hall. The large 
collection containing varieties of clays is accompanied by 
briquettes which illustrate the characters of the burned prod- 
ucts of most of the specimens. A model of a peat bog accom- 
panies the collection of peat and its products. 
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