414 Rural Architecture. 



there are two very important ends to be secured with cer- 

 tainty. These are (1) a lining which shall be and remain 

 strictly air tight, (2) a lining which will be reasonably 

 permanent. 



Galvanized Iron in Silo Lining. The tightest lining for 

 a wood silo may be made with a light weight of galvanized 

 iron, No. 28 to No. 32. Where the silos are 18 feet in 

 diameter or less this may be put directly upon the studding, 

 buying the strips 8 feet long and 36 inches wide, so as to 

 be nailed on up and down and exactly cover the space be- 

 tween three or four studs. Headers should be put in every 

 8 feet to nail the ends of the sheets to between the studs, 

 and -these are best when sawed to the curve of the silo. The 

 metal should be put on with roofing nails, nailing close so 

 as to make the joints tight. 



After the metal is in place it should be given a heavy 

 coat of asphalt paint, taking special care to make it heavy 

 where the nails and laps come so as to shut out the air. 



When the metal is in place and painted it should be 

 covered with a layer of sheeting made the same as that used 

 outside, by splitting good fencing in two. The object of 

 this layer of sheeting is, first to take the pressure of the 

 silage ; second, to act as a hoop for strength, and third, to 

 keep the silage from softening and wiping the paint from 

 the metal lining. Were it not for the fact that the heat of 

 the silage tends to soften the paint, and its settling to wipe 

 it off, it would be better to let the metal come next to the 

 silage. 



Where the silo is more than 1 8 feet in diameter it will be 

 best to use two layers of fencing split in two, placing the 

 galvanized iron between the two layers. In these cases the 

 sheets of metal may be put on horizontally, using those 36 

 inches wide. 



All Wood Lining of 4-inch Flooring If one is willing 

 to permit a loss of 10 to 12 per cent, of the silage by heat- 

 ing, then a lining of tongued and grooved ordinary 4-inch 

 white pine flooring may be made in the manner repre- 

 sented in Fig. 206, where the flooring runs up and down. 



