The EnsUage of Fodders. 



259 



in which case only one thickness of inside boards is provided, 

 against which the bricks rest. If large, the silo may be lined 

 with combined sheeting and lathing, and then plastered. Small- 

 diameter silos should be first boarded inside and then lathed and 

 plastered. Doors, which must be air-tight when closed, should 

 be provided every six feet, and a dormer window in the roof 

 admits the end of the silage carrier. 



The advantages of a round silo are: The largest cubic capacity 

 for a given amount of building material, no springing of walla 

 through internal pressure, no corners for poor silage, and finally, 

 great strength for a TninimnTn amount of building material. The 

 round sUo may be connected by a passage-way with the feeding 

 stable. 



407. The rectangular silo. — Silos placed in the barn are usually 

 of rectangular form, the girts extending horizontally with an 

 inside lining of boards running vertically. Comers are avoided 

 by boarding across them. When covered on the outside, venti- 

 lation may be provided by tacking cleats with holes in them to 

 the girts and nailtng the outside boarding to them, 



408. Weight of silage at different depths. — King ' calculates 

 the weight of silage two days after filling the sUo to be as follows: 



The above shows that ten feet down in the sUo the silage 

 weighs about thirty-three pounds per cubic foot, while at thirty- 

 six feet in depth it weighs sixty-one pounds per cubic foot. The 

 mean weight for silage at different depths is shown in the last 

 column. 



' Bui. 59, Wis. Expt. Sta. 



