Bul. 820, U. S. Dept. of Agriculture. PLATE XIII. 
F—38621A 
Fic. 1.—HIGH STUMPS CUT AS GUIDES IN LINING OUT FIRE LINE. THESE 
ARE REMOVED LATER SO THAT FURROWS CAN BE PLOWED. 
F—27413A 
FiG. 2.—A COMPLETED FIRE LINE, SHOWING PLOWED FURROWS WITH THE 
LIGHT, SANDY SOIL EXPOSED. 
CONSTRUCTION OF FIRE LINES IN JACK PINE. 
