SIXTH ANNUAL YEAR BOOK — PART VIII. 749 



Hardware — 



Nails 



50 lb. 8d common @ 3c 1.50 



2 lb. lOd common @ 5c 10 



8 lb. 3d cut @ 4 c 32 



6 lb. 6d cut @ 4c 24 



4 lb. shingle @ 4c 16 



2 lb. long finishing @ 5c 10 



Wire netting — 



63 sq. ft. 1-3 in. mesh @ 5%c 3.47 5.89 



Paintings 

 Priming coat, 



9 gal. oil @ 50c 4.50 



29 lb. yellow ocher @ 5c 1.45 



25 hours labor @ 15c 3.75 



Paint and labor, two cots 25.00 34.70 



Total cost 383.27 



Many silos are built similar to the one just described excepting that 

 in place of the lath and cement plaster the silo is ceiled with another 

 thickness of half-inch lumber, using water- proof paper between. That 

 the lining shall be tight, the boards must be of the same width and it 

 is necessary to have the lumber dressed so that the boards will be of 

 the same thickness and will lie closely together. This makes a fairly 

 good silo for a few years, if built of durable wood, but it is practically 

 as expensive and does not preserve the silage so thoroughly. 



The exterior covering of this style of silo may be the same as for 

 a plastered silo. If built inside the barn no roof or outer sheeting is 

 neccesary. 



From what we now know, the round wood silo plastered with cement 

 seems to be the new best construction, but the indications are that when 

 we learn to handle concrete to the best advantage this will be the 

 material for building silos. 



CONCRETE SILOS. 



Silos built of concrete have been 30 feet deep with the wall not more 

 than six inches thick at the base and tapering to four inches at the top. 

 Where gravel or crushed stone can be obtained at a reasonable price 

 it may be advisable to make the walls slightly thicker, and in cold cli- 

 mates they should be built with a dead-air space in the wall to prevent 

 the silage from freezing. In any event there should be enough heavy 

 wire or iron rods imbedded in the wall to withstand the strain of the 

 silage; unless this is done cracks are likely to appear. The amount of 

 wire necessary in each case will depend upon the size and depth of the 

 silo. The wall should be plastered on the inside with one part of Port- 

 land cement to two of good sharp sand troweled to a smooth surface. 

 This will resist the action of the acid in the silage. 



Cut 28 shows an all-concrete silo 20 feet in diameter and 42 feet 

 deep. The wall is 22 inches thick for the first 14 feet, 19 inches thick 



