482 



Bulletin 167. 



the large stav^e silo inside the barn was filled it was found that 

 more room was needed in which to store the corn crop. This 

 was obtained by constructing a small silo 24 feet high and 12 feet 

 in diameter, which was set up in a day and hoops of fence wire were 

 put on and secured as shown in frontispiece. The staves were 

 of 2x6 hemlock, 24 feet long, with edges neither matched nor 

 bevelled. The silo was filled directly after completion and was 

 satisfactory in every way. 



Where the round hoops are used it is well to have each hoop in 

 from three to four sections. For a silo 12 feet in diameter three 

 sections will be sufficient, while for a silo 16 feet or more in diame- 

 ter the hoops will handle more conveniently if they are in four 

 sections each. If the method of construction shown in figure 

 77 is followed, then the hoops will need to be in four sections 

 each, the ends being passed through the upright 6x6 posts 

 and secured b}^ heavy washers and nuts. A chisel should be 

 used to sink one edge of the washer slightl}^ so that the 



Fig. 79. — Shows how the ends of hoops may be secured, 



strain upon the nut will be squarely in line with the direction of 

 the pull. If the upright posts are not used then a convenient 

 way to secure the hoops is by means of the cast iron lugs as 

 shown in fig 79. The hoops should be long enough so that they 

 can be let out if it becomes necessar}^ after the silo is filled and 

 the strain becomes great. If when the hoops are tightened it 

 is found that the thread at the end has not been made sufficiently 

 long, pieces of gas pipe may be used as washers with which to 

 take up the slack. 



The bottom hoop should be about six inches from the base of 

 the silo; the second hoop should be not more than two feet from the 

 first ; the third hoop two and one-half feet from the second, the 

 distance between hoops being increased by one-half foot until 

 they are three and one-half feet apart, which distance should be 



