234 AGRICULTURE OF MAINE. 



The figures for brick silos were furnished by the Iowa Ex- 

 periment Station (Bulletin too), and are based upon the fol- 

 lowing cost: Brick. $8 ])er M.: mason, $4 per day; helpers, 

 $2 per day. 



Single \\'all Silo: 14 feet in diameter, $9 per foot of height; 

 16 feet in diameter, $10 per foot of height; 18 feet in diameter, 

 $11.50 per foot of height. 



Double Wall Silo: 14 feet in diameter, $13 per foot of 

 height; 16 feet in diameter, $14 per foot in height; 18 feet in 

 diameter, $16 per foot in height. 



HOEEOW TIEE. 

 These are used to some extent for silo building and probably 

 will be used more in the future. I have been unable to obtain 

 figures as to cost applicable to New England. 



CONCRETE SIEOS. 



Actual cost of any number of concrete silos is as difficult to 

 obtain as for stave silos for much of the labor of erection is 

 done by the men on the farm and no account of time kept. Es- 

 timates from several states indicate a total cost of S2.50 to $3.00 

 per ton capacity for silos holding 90 to 120 tons. These figures 

 are not exact. Concrete block silos seem to cost slightly more 

 in total expense but more of the labor can be done by the ordi- 

 nary farm help. 



This means that monolithic (or solid wall) concrete silo of 

 100 tons capacity should cost $250 to $300. 



The cost of any silos for any specific location can only be 

 determined by the dairyman by securing estimates for his par- 

 ticular conditions and for the silo he desires. All silo compa- 

 nies and many cement dealers will cheerfully assist in determin- 

 ing cost. 



CONSTRUCTION. 



It is necessary to establish a foundation below the frost line. 

 Usually it is not advisable to go over 6 feet below the surface 

 of the ground on account of the extra labor required to throw 

 the silage out. Also the cost of construction at a greater depth 

 is often more than that for the additional height. If the ground 



