196 INDIAN CORN CULTURE. 
in place. Usually bolts are set in the wall 
when it is built, and these project enough above 
this to just extend through. the sills to permit 
capping with washers and nuts. 
Roof.—A roof is required only oa silos out of 
doors. This may be built to suit, but it should 
at least protect the silage from rain and snow. 
It should, if of permanent character, contain a 
dormer window or door in roof through which 
the elevator may carry the cut fodder and de- 
posit it within the silo. 
Capacity of silo.—The capacity of the silo 
FIG. 57. 
foot of silage under average conditions will 
weigh 40 lbs.—perhaps a little less. A day’s 
feed for one cow would not probably as a rule 
exceed this amount. If silage is fed one cow 
200 days she will consume, say 8,000 Ibs., or 
four tons. On this basis 10 cows will require 
40 tons, though it would be well to make the 
capacity 50 tons. 
Plans for round silo— The accompanying 
illustrations, reproduced from Bulletin 28 of 
