340 Report oF tHE HORTICULTURAL DEPARTMENT OF THE 
one-half, then with upright boards battened with 4 inch strips 
as shown in the cut. The studding is covered inside with 3-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 g-inch 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 3x24 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 15x18 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. a et 
