Thirty-fourth Annual Convention. 



207 



Cut 1. — Large Cement Silo to Which Cow Stable is to be Extended. 



The outward pressure on the wall of a silo filled with cut 

 corn is about 11 pounds for every foot in depth; making a 

 pressure of 110 pounds at a depth of 10 feet; 330 pounds at a 

 depth of 30 feet; and the enormous pressure of 440 pounds per 

 square foot at a depth of forty feet. This increase in pressure as 

 the depth increases must be considered in silo construction and 

 the lower portion made much the stronger. 



Before building a silo the most careful attention should be 

 given to location, size, form, and method of construction. These 



Cut 2. — Two Round Silos Forming End of Barn. 



