Bui. 1298, U. S. Dept of Agriculture 
PLATE X 
Fig. 1.— New ground-wood pulp placed directly on ground. A concrete base would prevent 
all infection from the ground upward into the base of the pile 
Fig. 2.— Rotten platform recently used for ground wood. It rests directly upon moist soil, 
from which it became infected. If plank foundations are to be used, all decaying material 
should first be removed from the site, the ground surfaced with cinders, and fresh new timber 
used for each pile. In the long run a concrete base will be found much better and cheaper 
Fig. 3. — Base of a pile of hydraulic-pressed ground-wood pulp stored two years in an open 
shed. The light area to the right is a very rotten spot in the floor, from which the piece of 
pulp to the left has been turned back. The indication is clear that this particular decayed 
area in the pulp originated from the floor 
Fig. 4.— Xew ground-wood pulp stored on a rotten base consisting of hydraulic-pressed ground- 
wood pulp two years old. The floor is also completely decayed. Under no circumstances 
should clean pulp be placed in contact with decayed or infected material 
