194 INDIAN CORN CULTURE. 
Lining and floor.—The most satisfactory 
inside lining for the walls of wooden silos con- 
sists of two layers of boards with tarred paper 
laid between. The first layer would be placed 
horizontally against the studs, next would 
come the paper, and last the inner layer of 
boards nailed on vertically, smooth side out. 
With the round form the lining all goes on 
horizontally. Strips one-half inch thick and 
four to six inches wide are placed on each 
_ other tightly and so as to break joints. This 
construction strengthens the silo, as a hoop 
does a pail. There can be no springing out at 
one place in the side and not at another. An 
equal pressure extends from the center to the 
circumference on all sides. 
It will be well to have the floor of stiff clay 
or of cement. It is important to have it rat- 
proof, as these pests burrow up into the silage 
where the floor is soft and cause great damage 
by admitting air into it. 
Walls.—The walls of wooden silos remain 
sound longest when they are well ventilated. 
Where they are tightly boxed up moisture ac- 
cumulates within and decay occurs. Auger 
holes bored between studs at bottom give suffi- 
cient ventilation if there are openings at top of 
wall. All these holes or openings should be 
covered with wire netting to keep out rats and 
mice. The studs must be strong enough to 
