14 The Colorado Experiment Station. 
rado conditions. The reason for this is that one can be built by 
anyone of ordinary intelligence, with unskilled labor, with but little 
advice or aid. Sand and gravel can be secured conveniently in most 
any locality at a low cost, making the cash outlay small for such 
Solid Wall Concrete Silo on the Farm of Nelse Anderson, Niwot, Colo. 
(Photo by Risser.) 
construction. Because it meets all requirements of a good silo, is 
a permanent structure, and costs less for construction than any 
other type of silo suitable to this climate, unless it be the pit silo, 
it is to be strongly recommended. The solid wall concrete silo will 
give more efficient service for a dollar invested than any other above 
ground silo on the market today. 
Cost of Concrete Silos Built in 1911. 
Data collected and compiled by P. V. Maris. 
Actual 
Dimen- Cost of Rental of Cost of Cost of Estimated Cash 
sions Capacity Forms Forms Materials of Labor Total Cost Exp’ded 
*10x29 45 $ 25.10 $. $ 96.45 $ 60.00 $181.55 $122.15 
112x25 52 33.80 . 60.85 74.25 146.35 115.00 
f 12x27 % 59 11.25 61.90 104.00 177.15 111.00 
fl2x28 y 2 62 11.25 62.40 94.00 167.65 111.65 
§12x281/2 62 ...... ' 10.00 102.20 110.35 222.55 160.55 
tl2x3iy 2 72 33.80 . 65.30 102.00 184.20 106.90 
fl2x31i/ 2 72 4.40 54.95 106.00 185.85 117.35 
fl2x40 100 10.00 156.96 88.00 259.96 359.96 
