Bui. 510, U. S. Dept. of Agriculture. 



Plate IV. 



Lumber Sanitation: Wood-Rottinq Funqi.— IV. 



Fig. 1. — Shortlcaf pine whicli lias rotted during 10 months' storage in a retail yard at New Orleans. 

 YiQ. 2. — A structural pmc timber whicli lay on the ground until severely rottccf and was then thrown 

 up into a pile of sound lumber. Fig. 3. — Mycelium of a wood-destroying fungus on the face of pine 

 boards iust uncovered in breaking down a pile (at a height of G to S boards from the bottom, but 

 probably has gone much higher). Figs. 4 to G. — Polystictus versicolor: 4, Upper surface; 5, lower sur- 

 face; 0, plant growing on the end of a hardwood board in a lumber pile. Figs. 7 and 8. — Polystictus 

 hirsutus: 7, Upper surface; 8, lower surface. 



