EXPERIMENT STATION BULLETINS. 



259 



Fig. 22. Section of foundation and floor of 

 the Wells Parish silo (Fig 21). 



foundation stands 4 inches above ground and extends 24 inches below 

 ground. The upper 12 inches of the foundation is 12 inches thick and 

 the lower Hi inches, widens symmetrically to 24 inches at the base. See 

 Fig. 22. The blocks used in the construction of the silo are solid, have 

 a face 24 inches by 8 inches, and have a uniform thickness of 3 inches. 



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Fig. 23. Cement block used in the construction 

 of the Wells Parish silo (Fig. 21). 



See Fig. 23. The blocks are laid up in cement mortar, sand and cement 

 in the proportions of 2 to 1, flush with the inner edge of the foundation. 

 There is one continuous doorway, about 25 inches wade, extending from 

 the first course of blocks to the roof. There is no door frame. 



The wall is not reinforced by wires or rods embedded in the mortar 

 between courses but is strengthened by 2 inch band-iron hoops upon the 

 outside such as are sometimes found on stave silos. The hoops are 

 placed four courses, or about 33 inches apart, and are drawn firmly 

 against the walls by lugs. In the doorway behind each of these hoops 

 is fitted a li/4 inch by 4 inch piece of wood to prevent yielding of the 

 boundary wall of the doorway when the hoops are drawn tight. See 



Fig. 24. Section of sllo wall (Fig. 21) 

 plowing doorway, brace, hoop,.ete. 



Fig. 25. Section of silo wall (Fig. 28) 

 showing doorway, and brape and tT&me o( 

 Steel, boop, etc- 



