THIRTY-SEVENTH ANNUAL CONVENTION. 233 



is simply another two-by-four set back from the inside edge of 

 the stud an inch and a half and either well spiked or bolted 

 in place. The upper and lower jambs of the door are made 

 from short lengths of two-by-four spiked across at the proper 

 places. 



The doors themselves are made from flooring boards nailed 

 and screwed together at right angles, with a sheet or two of tar 

 paper between. 



In fitting the doors before filling the silo, a layer of tar 

 paper or heavy building paper should be put between the jambs 

 and the doors. The doors are held in place by heavy bolts, 

 fitted with large nuts and washers, passing through them and 

 through pieces of two-by-sixes laid across the opening on the 

 outside of the silo. Two cross-pieces are needed; one near 

 the bottom, the other near the top of the door. 



When this point in the construction of the silo is reached, 

 although not completed, it may be filled if it is necessary to do 

 so. 



Siding. 



Although somewhat expensive, galvanized sheet metal 

 makes a good siding. Probably the most practical plan, how- 

 ever, is to put on some hoops and nail ordinary boxing lumber 

 to them. The hoops are made of three thicknesses of the sheet- 

 ing lumber put around the outside of the silo every four feet, 

 being careful not to cross doors. One thickness is put on at a 

 time. The joints must break to insure strength. The boxing 

 lumber is put on vertically and nailed to the hoops. The cracks 

 are covered with ordinary weather strip. 



The Roof. 



A plate similar to the lower sill is put around the top of 

 the silo on top of the studding. The roof is usually made in 

 the same manner as the roof of a house except the rafters are 

 put up in conical form, and no joists are put in. The roof 

 boards are put on in short lengths, and shingles or some other 



