SILOS IN STONE AND BRICK 



213 



The door itself is constructed of grooved and tongued boards 2 inches 

 thick by 6 inches wide, bolted to two 2" by 4" cross pieces. Its 

 edge is bevelled, and the door frame is accurately bevelled to suit. 

 The door is placed in position from the inside of the silo, and is therefore 



held tightly closed by the outward pressure of the silage behind it. 

 It is also held in place by two |-inch bolts passing through the 2" by 

 4" bridge piece shown. 



Chute. — A vertical chute down which the silage from the emptying 



