Bui. 510, U. S. Dept. of Agriculture. 
Plate I. 
Lumber Sanitation: Wood-Rotting Fungi.— I. 
Fig. 1. — Thin section of "red-heart" pine, showing fungous threads and holes where these have bored 
through the walls of the wood cells. Fig. 2. — Mycelium on a board from a clay mine, Joplin, Mo. 
Fig. 3.— The mushroom Pluteus cervinus on a rotten log. Fig. 4.— A species of Hydnum. 
