THE "WISCONSIN" SILO. 69 



set double and the distance apart to give the desired width. 

 A stud should be set between the two door studs as though 

 no door were to be there, and the doors cut out at the; 

 places desired afterwards. The construction of the door 

 is represented in Fig. 7. 



The doors are usually made about 2 feet wide and 

 from 2y 2 to 3 feet high, and placed one above the other 

 at suitable distances apart. It has been suggested that to 

 insure security a strip of tar paper should be placed the 

 entire length of the silo on the inside over the doors. 



Silo Sheeting and Siding. The character of the siding 

 and sheeting will vary considerably according to condi- 

 tions, and the size of the silo. 



Where the diameter of the silo is less than 18 feet in- 

 side and not much attention need be paid to frost, a single 

 layer of beveled siding, rabbetted on the inside of the 

 thick edge deep enough to receive the thin edge of the 

 board below, will be all that is absolutely necessary on 

 the outside for strength and protection against weather. 

 This statement is made on the supposition that the lining 

 is made of two layers of fencing split in two, the three 

 layers constituting the hoops. 



If the silo is larger than 18 feet inside diameter, there 

 should be a layer of half-inch sheeting outside, under the 

 Biding. 



If basswood is used for siding, care should be taken 

 to paint it at once, otherwise it will warp badly if it gets 

 wet before painting. 



In applying the sheeting begin at the bottom, carry- 

 ing the work upward until staging is needed, following this 

 at once with the siding. Two 8-penny nails should be used 

 in each board in every stud, and to prevent the walls from 

 getting "out of round" the succeeding course of boards 

 should begin on the next stud, thus making the ends of 

 the boards break joints. 



When the stagings are put up, new stays should be 

 tacked to the studs above, taking care to plumb each 

 one from side to side; the siding itself will bring them 



