Bulletin No. 336 
DEPARTMENT OF THE INTERIOR 
UNITED STATES GEOLOGICAL SURVEY 
GEORGE OTIS SMITH, Director 
WASHING AND COKING TESTS OF COAL 
AND CUPOLA TESTS OF COKE 
CONDUCTED BY THE 
UNITED STATES FUEL-TESTING PLANT 
AT ST. LOUIS, MO. 
JANUARY 1, 1905, TO JUNE 30, 1907 
BY 
RICHARD MOLDENKE, A. W. BELDEN 
AND G. R. DELAMATEE 
WITH INTRODUCTION BY 
J. A. HOLMES 
In Charge of Technologic Branch 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1908 
