SILOS AND SILAGE. 199 



Square silo.— In building the square or rec- 

 tangular silo the sills may be of 2x10 plank, in 

 two layers, halved and spiked at the corners. 

 The 2x10 studs ai-e toe-nailed to the sills, 18 

 inches apart, centeV to center. If the silo is to 

 be more than 20 feet deep then 2x12 sills and 

 studs would be better, on account of increased 

 side pressure. The base of each stud may be 

 cut on .the outside to block against a 2x4 piece 

 spiked along the outer line of sill to keep base 

 of studs from being forced outward. The studs 

 at the top are fastened with a strong plate, to 

 which they. are spiked. 



Cost of silo.— The cost of a silo depends upon 

 many conditions, and no estimates can be given 

 that will apply to all localities, there being such 

 a difference in cost of materials, labor, etc. A 

 cheaply constructed silo, however, is an expen- 

 sive one in the long run. It will pay much 

 better to build carefully and well, having the 

 construction strong, tight, and free of air-holes 

 at sides and bottom. Most of the condemna- 

 tion of the silo has resulted from trials where 

 the construction has been poor and the con- 

 tents badly preserved. Prof. King gives in Bul- 

 letin 28 of the Wisconsin station estimates on 

 the cost of a well-constructed round silo of 180 

 tons capacity as $344.44, or |1.91 per ton. Nu- 

 merous estimates have been published by dif- 

 ferent persons where the cost is much less than 



