340 Report of the Horticultural Department op the 



one-half, then with upright boards battened with 4 inch strips 

 as shown in the cut. The studding is covered inside with f-inch 

 ship-lapped lumber; following this is a course of building paper 

 lapped one-half and then the ceiling of matched boards. The 

 floor beams are first covered with matched boards, then with 

 building paper lapped one-half and lastly with matched flooring. 

 The ceiling beams are covered above with finch ship-lapped 

 lumber, and beneath with a course of building paper lapped one- 

 half and then with ceiling of matched boards. The roof is made 

 of surfaced hemlock laid on 2x4 inch rafters and covered with 

 roofing paper. For a permanent building a shingled roof with 

 steeper pitch would doubtless be more economical. 



The doors are made after the manner of doors used for cold 

 storage rooms. They should fit perfectly, and it is well to pro- 

 vide weather strips or felt for the edges to press against when 

 the doors are closed. The doors should be firmly supported with 

 strong hinges. At the top of each large room opposite the 

 entrance is a small door 3x2^ ft. as shown in Fig. 11. These are 

 made quite similar to the doors at the entrance. They aid in 

 securing rapid and thorough ventilation. Flues from each large 

 room leading through the roof are made for the same purpose. 

 These are fitted with air tight covers at the top, which are 

 opened from the roof as shown in Fig. 11. They are closed at 

 the bottom by a slide which is reached from the roof through 

 the flue. 



The interior is divided into two large rooms and one small one 

 by partitions made of two thicknesses of matched lumber with 

 building paper between. The large rooms are each 15x13 ft. 

 and hold about 3,000 apple trees of | inch caliper. The small 

 room, 4x15 ft., is for fumigating smaller lots of stock. 



Every detail of work should be performed with the idea con- 

 stantly in mind of making the building air tight. The sheathing 

 paper must be laid smoothly and evenly and the sheathing 

 boards and ceiling must be free from warps, knots or other 

 defects which impair their value for the purpose for which they 

 are intended. 



