15 



a door in the roof through which to fill the silo. If it is not judged advisable 

 to expend either material or labour in the construction of such a roof, a 

 covering of slanting boards should at least be erected. 



THE PLASTERED SILO. 



The plastered or Gurler silo is adapted to localities where a supply of 

 native lumber can be had, which furnishes a cheap building material. It 

 may be built entirely from ordinary lumber, requires in its construction no 

 highly skilled labour, is said to preserve the silage as well as any type of 

 silo in use, and when properly made is strong and durable. 



(Fig. 8.) Sill of 2- by 4-inch lumber on foundation wall. 



A sill should be placed on the top of the foundation-wall. This is made 

 of 2- by 4-inch lumber, cut into 2-foot lengths. Each piece is put into place 

 while the concrete is soft, and anchored by three heavy spike nails or thin 

 bolts with nuts and washers on their ends. This anchoring is necessary, and 

 ties the woodwork of the silo firmly to the concrete. 



ERECTING THE STUDDING. 



The studs are made of two lengths of 2- by 4-inch lumber, spiked together 

 at the middle, and are erected 2 feet apart unless the diameter and height of 

 the silo are more than about 10 by 30 feet, when it is advisable either to use 

 2- by G-inch lumber, or set the studding only 18 inches apart. Two pieces of 

 2- by 4-inch lumber spiked together to make a 4- by 4-inch are used as a 

 centre pole to tie the studding to while they are being set up. Each separate 

 stud is toe-nailed to the centre of a section of the sill. Only the lower half 

 of the studding is put up first, the second piece being spiked on after the 

 lower half of the silo is nearly complete and needs no bracing. The studding 

 must be plumbed and tied in position. 



