Bui. 36, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate X. 



.: .>^. 



Fig. 1 .—Section Taken 35 Feet from the Ground from a Dead Tree. 



Fig. 2.— Section Showing More Advanced Stage 

 OF Decay. 



Fig. 3.— Section from Tree Shown in 

 Fig. 2, Made 15 Feet Higher Up. 



EARLY STAGES OF "RED ROT.' 



