Bui. 379, U. S. Dept. of Agriculture. PLATE |. 
Fic. 1.—SMuUT-DUST EXPLOSION IN THRESHiING MACHINE IN EASTERN WASHINGTON. 
PHOTOGRAPH WAS TAKEN AT TIME EXPLOSION AND FIRE OCCURRED. 
Fic. 2.—ENGINE PULLING A MACHINE AWAY FROM STRAW STACK AFTER EXPLOSION 
AND FIRE. 
