98 THE FARM DAIRY. 



away, but on the inside this tendency to 

 straighten helps to hold it in place. My experi- 

 ence teaches me that the most satisfactory way 

 to sheet the outside is to put on the hoops and 

 put the sheeting up and down, nailing it to the 

 hoops which should be of one inch hard wood. 



Kind and Amount of Cement. — ^For the ce- 

 ment work use none but the best Portland ce- 

 ment that you can buy. Use one part cement 

 and two parts of clean sand. Be sure there is no 

 loam or clay in the sand, as it will certainly 

 cause trouble. The cement should ha,ve a thick- 

 ness of % to % of an inch. 



Silo Roof. — It matters little whether there is a 

 roof on the silo or not. It is much in the way 

 when we are filling, and I have failed to learn 

 of any good it has done except to prevent hav- 

 ing to throw oiff the snow after a storm when we 

 were fading from it. The water does no harm : 

 in fact it is often an advantage to have the 

 water when we are done filling to give weight 

 to cause the silage to settle and pack properly. 

 I have one without a roof, and think that I 

 shonld not put on a roof if I were to build more. 



Cost of Silo. — The silo that I put no roof on 

 cost me 12% cents per square foot of surface. 

 To illustrate: a silo twenty feet in diameter is 

 sixty-three feet in circumference and if thirty- 

 eight feet deep it has 2,400 surface feet, which 

 at 12% cents per square foot would cost $300 



