Bui. 552, U. S. Dept. of Agriculture. 



Plate IV. 



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74 









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 2h feet above the ground, insuring 



excellent ventilation. 



