THE "WISCONSIN" SILO. 45 



The cost of such a silo as that described .in the foregoing 

 pages, is estimated by Prof. King at about 12 cents per square 

 foot of outside surface, when the lining consists of two layers 

 of half-inch split fencing, with a 3-ply Giant P. and B. paper be- 

 tween, and with one layer of split fencing outside, covered with 

 rabbetted house siding. If built inside of the barn, without a roof 

 and not painted, the cost would be reduced 3 cents per square foot, 

 or more. Silos of this type, 30 feet deep, built outside, provided 

 with a roof and including 6 feet of foundations are stated to cost 

 as follows: 13 feet inside diameter (80 tons capacity), $183.00; 

 15 feet diameter (105 tons capacity), $211.00; 21 feet diameter 

 (206 tons capacity), $298.00; and 25 feet diameter (300 tons 

 capacity), $358.00. 



Complete specifications and building plans for a 300-ton silo, 

 of the kind described in the preceding pages, are given in Prof. 

 Woll's Book on Silage. The dimensions of this silo are: Diameter, 

 26 feet; height, 30 feet. 



According to our present knowledge this form of silo is most 

 likely the best that can be built; it is a somewhat complicated 

 structure, calls for more time and skill for its construction, and 

 costs more than other kinds of wooden circular silos, especially 

 more than the stave silo soon to be described; but once built 

 needs but little attention and it is durable and economical; being 

 practically air-tight, the losses of food materials in the siloed 

 fodder are reduqed to a minimum. 



Modifications of the Wisconsin Silo. 



Several modifications of the Wisconsin Silo have been proposed 

 and have given good satisfaction; one is described by Prof. 

 Plumb in Purdue Experiment Station Bulletin No. 91, as follows: 



The studs are 18 inches apart, and for about half way up there 

 are three layers of sheeting against the studs with tarred paper 

 between. The- upper half of the studs has but two layers of 

 sheeting. The sheeting was made by taking 2x6-inch white pine 

 planks and sawing to make four boards. The silo rests on a 

 stone wall 18 inches deep and 16 inches wide. It is 30 feet high, 

 18 feet 4 inches inside diameter, and holds about 150 tons. An 

 inexpensive but durable roof was placed upon it. The cost of 

 this structure, is as follows: As the work was all done by the 



