Bui. 820, U. S. Dept. of Agriculture. 



Plate XIII. 



/^ 



:'^- '^ . 





.ji 



Fig. I. — High Stumps Cut as Guides in Lining Out Fire Line. These 

 Are Removed Later so that Furrows Can Be Plowed. 



Fig. 2. — A Completed Fire Line, Showing Plowed Furrows With the 

 Light, Sandy Soil Exposed. 



CONSTRUCTION OF FIRE LINES IN JACK PINE. 



