400 Rural Architecture. 



air-tight joint. A 6-inch board may be fitted around the 

 outside of the inner side of the door jambs to form the rab- 

 bet for the doors, or the jambs may be made as represented 

 in Fig. 196. There will be slight shoulders left in the 

 round stone silo above and below the doors when these are 

 made flat, and these should be filled out with mortar when 

 plastering, giving a long, gentle slope back to the wall. 



The door is best made of two layers of 6-inch flooring, 

 tongued and grooved, crossing at right angles, nailed or 

 screwed together, with a layer of good acid and water 

 proof paper between, as shown at E, Fig. 196. To make 

 the door fit perfectly air-tight there should be tacked to the 

 face of the door jamb, all around, a wide strip of thick roof 

 paper or strips of old worn out rubber belting, and the door 

 drawn up against this with four |x4 inch lag bolts pro- 

 vided with washers. 



If one prefers to do so the door may be made small 

 enough so as to leave a half-inch space between it and the 

 jamb all around, and this space filled with puddled clay 

 after the door is put in place. Either of these methods is 

 better than to tack strips of tar paper over the joints. 



CONSTRUCTION OF EEICK SILOS. 



Very excellent silos may be made of brick, as repre- 

 sented in Fig. 199, and where brick of a good quality can 

 be obtained at $4.25 to $7.00 per thousand a silo which will 

 last indefinitely may be made at a moderate cost. 



497. foundation. The foundation of the brick silo is 

 beet made of stone, wherever these may be had, carrying 

 the stone work up at least a foot above the ground and be- 

 ginning below frost line. The brick work will then be set 

 with its inner face flush with the inner surface of the stone 

 work. 



If the silo is to be carried 20 or more feet above the stone 

 wall it will be desirable to bed a f-inch round iron hoop 



