THIRTY-SEVENTH ANNUAL CONVENTION. 241 



Doors and Openings. 



Openings must be left on the side of the silo next the barn. 

 They should be placed no more than four feet apart, a convenient 

 size being 2x2 y 2 feet inside measurements, the longer way up 

 and down. The form is constructed so as to leave a shoulder 

 on the inner edge of the opening which is two inches deep with 

 a one inch jam. Reinforce each doorway with twisted wire 

 completely around the opening to prevent splitting. 



The doors to fit into these depressions should be made dou- 

 ble of one inch matched lumber and stripped along the edges 

 with tarred paper or felt in order to make air-tight joints. 

 Generally the doors are set in place allowing the pressure of the 

 silage to hold them. They may be bolted in place, however, by 

 running a long bolt through the center of the door and a cross 

 piece outside the opening holding to the outer edges of the silo. 

 When in place the inner surface of the doors is flush with the 

 inner surface of the walls. 



A ladder leading up into the silo is necessary. To attach 

 one to a concrete silo it is a good plan to set bolts a few feet 

 apart on each side of the door openings as the wall is being 

 built. Turn the bolts before the concrete sets completely so 

 they may be removed and the ladder attached to them. 



A Simple Roof. 



Silos should have a roof to protect the silage after feeding 

 has begun. It is not necessary for the preservation of the feed 

 before. Throw up rafters to the middle making a conical roof, 

 and shingle. Leave a trap door in the roof for the pipe when 

 filling. 



