THIRTY-SIXTH ANNUAL CONVENTION. 321 



feeding room with a feed way, it is as convenient for feeding 

 as when located in the building itself. A very common arrange- 

 ment is to so locate the silo that the passageway from silo to 

 barn is a continuation of the feed way in the barn. In general, 

 it seems that there are few advantages in building a silo inside 

 of a building and many in building it outside. There are types 

 of barns, the large round barn for instance, which are of a form 

 making it possible for a silo to be conveniently located at the 

 center. 



Foundation. 



Any building should rest upon a foundation sufficiently 

 broad to prevent appreciable settling, and deep enough to rest 

 upon soil which is never disturbed by frost. In the case of a ma- 

 sonry silo the foundation may be advantageously a continuation 

 of the wall. If the space enclosed within the foundation be ex- 

 cavated, it becomes available for the storage of silage. This space, 

 however, costs a little more than the space in other parts of the 

 silo on account of the additional labor of excavation. Thus, it 

 will be seen that it is not economical to extend the foundation 

 deeper than necessary to get below frost. For the Iowa, a good 

 depth of pit is three and one-half feet. 



Drainage of Foundation. 



In case there is a probability of ground water standing 

 about the foundation, there should be a tile drain placed. Porous 

 back filling placed outside the foundation insures that any sur- 

 face or ground water will sink to the drain rather than fill the 

 blocks of the wall through any crevice which may exist. 



There are at least four different types of foundations, one of 

 which will be applicable to any conditions which may arise. The 

 different types are as follows : 



1. Building blocks throughout. 



2. Concrete footing with blocks extending from the floor 

 up. 



