BRICK AND ALL-METAL SILOS. 103 



jambs be made of 3x6's or 3x8's, rabbetted two inches deep to 

 receive the door on the inside. The center of the jambs outside 

 should be grooved and a tongue inserted projecting three-fourths 

 of an inch outward to set, back into the mortar, and thus secure 

 a thoroughly air-tight joint between wall and jamb. The doors 

 may be made of two layers of matched flooring with tarred 

 paper between, and lag screw bolted to the jamb, so as to give a 

 perfect smooth face next to the silage. 



Single Wall Brick Silo. A 100 ton reinforced brick silo was 

 built in 1909 by the West Virginia Experiment Station at Mor- 

 gantown, and described in their Bulletin 129. The wall was laid 

 up the width of a brick or 4 inches thick with 20d annealed wire 

 nails imbedded in the cement mortar so that the ends projected 

 from the wall about 2 inches into the silo. When the cement 

 mortar had hardened, woven wire fencing was cut into pieces 

 of proper length and fastened close to the inside of brick wall 

 with the clinched nails. Two thicknesses of wire were used for 

 lower half of silo and one thickness for upper half. Each strip 

 lapped 2 inches over the one beneath. This wire was thor- 

 oughly covered with cement mortar of one part cement and three 

 parts sand. Prof. Atwood writes (Aug., 1914) that the silo 

 has given excellent satisfaction. He recommends, however, that 

 the wire fencing should have perfectly straight horizontal wires, 

 no coils, as the coils stand out from the brick work and necessitate 

 more plastering. Many silos of this type have been constructed 

 during the past two years, especially in the South. 



Ail-Metal Silos. 



The canned fruits and vegetables for our tables remain good 

 indefinitely so long as air is absolutely excluded. The admission 

 of air, in however slight degree, produces mold and rot, and 

 destroys a very considerable part of the food value. 



Where tests have been made, silos made of metal or lined with 

 metal, have been found to most nearly approach the air-tight 

 containers in which we buy our canned vegetables, and if these 

 metal cans are good for our dainty table delicacies why are 

 they not good, for our "canned corn" known as silage? 



The fact that over 2,000 metal silos are now in use in this 



