Bui. 149, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



P-ATE !||, 



MJi 



Fig. 1.— Cross Section of a Living Beech Tree Diseased by 

 fomes igniarius. 





Fig. 2.— Cross Section of a Living Red Oak Tree Rotted i 

 Fomes EVERHARTII. 



