19B The Sweet Potato 



spaced 12 inches apart from center to center. The walls 

 of the storage house are made by setting 2 by 4 inch 

 studs on the girders every two feet and nailing them to 

 the sleepers. On the outside of the studs 1 by 6 inch 

 boards are nailed diagonally to brace the wall; over 

 these a layer of heavy building paper is tacked and 

 matched siding then put on. A layer of 1 by 6 inch 

 boards is nailed on the inside of the studding, then a 

 layer of building paper, and over this matched boards. 

 In the lower South, the first layer of boards on the inside 

 of the studding may be omitted so far as the control of 

 temperature is concerned, but in regions of high humid- 

 ity (near the seacoast) it is deemed advisable to use four 

 layers of boards, two on the inside and two on the outside 

 of the frame, as suggested above. The tighter the walls, 

 the less diflBculty will be encountered in controlling both 

 temperature and moisture. Two 2 by 4 inch pieces 

 should be placed on top of the studding for eave plates, 

 to which the rafters are nailed. The floor is made by 

 laying 1 by 6 inch sheathing over the joists, then a 

 layer of heavy building paper and over this 1 by 4 inch 

 tongue-and-groove flooring. The building may be cov- 

 ered with shingles, rooflng paper, galvanized iron, or 

 any other kind of roofing material ; but galvanized iron 

 is to be preferred, because it is durable and lessens dan- 

 ger from fire. Use 2 by 4 inch scantling for rafters and 

 make the roof tight to keep out the cold. The rafters 

 should be cut to fit over the plate at the lower end and 

 to fit snugly against the ridgepole at the upper end. 

 On the outside of the rafters put a layer of 1 by 6 inch 

 sheathing, and over this the roofing material. On the 

 inside of the rafters nail a layer of 1 by 6 inch sheath- 

 ing, then a layer of heavy building paper, and over this 



