Bui. 552, U. S. Dept. of Agriculture. 
Plate IV. 
Fig. 1.— Cement as Foundation Material. 
These blocks extend 2 feet above and 2 feet into the ground. 
Fig. 2.— Another Type of Permanent Foundation. 
Steel rails are embedded in cement piers. The lumber is fully 2V feet above the ground, insuring 
excellent ventilation. 
