418 Rural Architecture. 



up and into the silo, thus keeping the lining and studding 

 dry and at the same time drying the under side of the roof 

 and the inside of the lining as fast as exposed. In those 

 cases where the sill is made of 2x4' s cut in 2-foot lengths 

 there will be space enough left between the curved edge 

 of the siding and sheeting and the sill for air to enter, so 

 that no holes need be bored as described above and repre- 

 sented in Fig. 207 E. The openings at the plate should al- 

 ways be provided and the silo should have some sort of ven- 

 tilator in the roof. This ventilator may take the form of a 

 cupola to serve for an ornament as well, or it may be a 

 simple galvanized iron pipe 12 to 24 inches in diameter, 

 rising a foot or two through the peak of the roof. 



518. Painting Silo Lining. It is impossible to so paint a 

 wood lining that it will not become wholly or partly satur- 

 ated with the silage juices. This being true, when the 

 lining is again exposed when feeding the silage out, the 

 paint greatly retards the drying of the wood work and the 

 result is decay sets in, favored by the prolonged dampness. 

 For this reason it is best to leave a wood lining naked or to 

 use some antiseptic which does not form a water proof coat. 



THE STAVE OK TANK SILO. 



We have examined personally 19 stave silos and have 

 made a careful study of the unavoidable losses in one of 

 these. We have also studied the unavoidable loss in two 

 kinds of small stave silos. As a result of these observations 

 it has been demonstrated that there are several very serious 

 objections to stave silos intended as permanent buildings 

 out of doors. Some of these are stated below : 



1. When the silo is empty the staves shrink and loosen 

 the hoops and in this condition the wind racks the building, 

 getting it out of round, out of plumb, and out of place upon 

 the foundation. It is much more easily blown down than 



