DEPARTMENT OF GEOLOGY 
47 
The coals and lignites represented are as follows : 
Lignites, chiefly from the western United States, South 
America, England and Roumania; 
Bituminous coals, from the United States. 
Since the greater part of the collection of United States 
coals is shown in Hall 69, in Hall 70 the bituminous coals ex- 
hibited are principally from foreign countries. The larger 
representation among these is given to the coal fields of Eng- 
land and \\ ales, and Westphalia and Saarbriicken, Germany. 
With the latter series the associated rocks are shown. 
Anthracite coals, chiefly from Pennsylvania and Colorado, 
are shown; also cannel coals from various parts of the world. 
The grading and cleaning of coal by washing as performed 
in Germany. 
A section of a coal seam five feet in thickness, from the Bore 
Hole seam, Duckenfield and Merthyr collieries. New South 
Wales. 
Peat and its uses are represented by several varieties of raw 
peat and stages in the process of making fuels of several kinds 
from it. These include the old-fashioned air-dried peat fuel, 
peat briquettes, peat coke and charcoal. The several stages of 
the manufacture of textile fabrics and paper from peat are illus- 
trated and various other forms of utilization of peat, some of 
which are decidedly unique. 
Large blocks of asphalts and coal are shown apart from the 
systematic series of specimens. 
Hall 71. 
PETROLEUM AND ITS DERIVATIVES. 
This hall contains a very complete collection made by the 
Standard Oil Company to illustrate modes of occurrence of the 
mineral oils of the United States, the methods used for distilling 
and refining them, and the products obtained. It contains speci- 
mens of crude oil from the majority of the pools in the United 
States; specimens of various oil-bearing sands and minerals of 
the oil strata; models of oil refineries, and a complete series of 
the products of petroleum. By following the order given below. 
