3ul, 1037, U. S. Dept. of Agriculture. 



Plate li, 



Examples of Wood Infection. — II. 



Fig. 1. — Artifiaially infected blocks of red oak and white nak in the tile chamber ready for the 

 steaming experiments performed at tlie Madison laboratory. The large white areas of 

 mycolinm on the ends of the blocks in tlie ujiper four rows are wood-dcstrojing ftmgi and 

 probably developed as a result of infection in the log. Fig. 2. — Sawed felines "of oak Cspecies 

 not known). Note the abundant growth of mold which had developed in the material during 

 shipment and while in storage. Photographed by H. D. Tiemann. 



