12 
The Colorado Experiment Station. 
covered with tar felt. The faults thus far disclosed have been ex¬ 
cessive shrinkage causing cracks to open and thus breaking the in- 
Common-sense Silo on the Farm of Mr. Roberts, LaSalle, Colo. 
(Photo by Barr.) 
side coating. The cost is relatively high unless poor grades of 
lumber are used. 
Tung-Lok Silo .—A recent invention of a silo similar to the 
Common-Sense is the Tung-Lok. The material is milled into the 
desired lengths with mortises at the corners. If the material used 
is of good quality and could be treated with some wood preserva¬ 
tive, it should be a satisfactory silo, but would cost considerable, 
due to the thickness of the wall. 
Wooden-Hooped Silo .—This was also one of the early types, 
and is still being built. Hoops are made of several layers of thin 
material of the desired size. They are then tacked to a temporary 
framework about two feet apart and then sheeted inside and out¬ 
side with matched flooring, setting the flooring perpendicular and 
nailing it securely to the hoops. The advantage of having a dead 
air space is not great except in our high altitudes, as the freezing 
is not very great ordinarily. When properly built so as to make 
