DEPARTflENT OF GEOLOGY. 
DIVISION OF SYSTEMATIC GEOLOGY. 
The Division of Systematic Geology embraces those collec- 
tions which illustrate the history of the earth’s development and the 
materials of its crust. The selection and arrangement of specimens 
for this purpose has been made upon a basis of scientific rather 
than economic importance, since the latter phase of the subject is 
represented by the Division of Economic Geology and Metallurgy. 
The educational purpose of such collections has also been kept in 
mind, so that in general it may be said that most of the objects and 
phenomena described in any good text-book on geology, are here 
represented, either by actual specimens or by models. On the 
other hand, such works may be referred to for a fuller description 
of any of the specimens or discussions of the subjects presented. 
The collections are divided into six sections, located as fol- 
lows: 
Paleontology : Halls 35, 36 and 59. 
Physiographic Geology : Halls 60 and 6i. 
Meteorites : Hall 62. 
Systematic Mineralogy : Halls 63 and 64. 
Structural and Dynamical Geology : Hall 65. 
Lithology : Hall 66. 
