B^No.290 g _^A ^ S {^S^d&48 
DEPARTMENT OF THE INTERIOR 
UNITED STATES GEOLOGICAL SURVEY 
CHARLES D. WALCOTT, DlRECTOB 
PRELIMINARY REPORT 
ON THE 
OPERATIONS OF THE FUEL-TESTING PLANT OF THE 
UNITED STATES GEOLOGICAL SURVEY 
AT ST. LOUIS, MO., 1905 
JOSEPH A. HOLMES 
IN CHARGE 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1906 
