306 SOILING CROPS AND THE SILO. 



not be less than five feet, and the space for these 

 ought to be so calculated as not to interfere with the 

 placing of the hoops, and vice versa. 



The doors should be cut out after the staves 

 have been put in place and drawn tightly together. 

 They should be cut with a bevel on each of the four 

 sides and the beveled sides of the door should be 

 outward when it is in place. The pressure of the 



a 



Fig 33. Door of Stave Silo 



a, View of outside of door ; b, side view of door. 



silage when settling will then assist in the exclusion 

 of the air at the doors just in proportion to the extent 

 to which the said pressure exists. To aid further 

 in such exclusion of air, a strip of tarred paper 

 should be tacked on each of the beveled edges of 

 the door. Before sawing out the door, two cleats 

 should be bolted across the staves on the outside. 

 These are shown in the door as represented in Fig. 

 33. The end of the bolt which receives the burr 



