Bulletin No. 339 
Series Q, Fuels, 10 
DEPARTMENT OF THE INTERIOR 
UNITED STATES GEOLOGICAL SURVEY 
GEORGE OTIS SMITH, Director 
THE PURCHASE OF COAL UNDER GOVERNMENT 
AND COMMERCIAL SPECIFICATIONS ON THE 
BASIS OF ITS HEATING VALUE 
WITH ANALYSES OF COAL DELIVERED UNDER 
GOVERNMENT CONTRACTS 
BT 
D. T. RANDALL 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1908 
