310 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THE 
the horizontal ore. This was done to bring all weight as near 
the base as possible. See Plate XXIII. 
The separate sides were hinged together in pairs, the hinges 
being placed outside; after which two pairs were hinged to the 
third, the hinges being placed inside. This allowed of the fold- 
ing of the sides back and forth on one-another so that the whole 
when closed occupied no more surface space than did one rect- 
angular side. It also permitted of the front being opened as a 
double door to a width equal to the shortest diameter of the 
box. Two pairs of 4-inch backflap hinges were required on each 
pair of sides and also for fastening the pairs together. 
The top was constructed in three parts, one rectangular and 
two triangular frames. Except in length and braces the center 
or rectangular portion of top was made the same as one of Lhe 
sides. At first it was only braced by means of two diagonal] 
braces; later a triangular cross-brace was added. See Fig. 2, 
Plate XXIV. This not only prevented sagging of the cover but 
raised it so that water would run off; at the same time it formed 
The remaining parts of the top frame-work consist of two isos- 
celes triangles, the two equal sides of which were of the same 
length as the width of one side of the fumigator. These triangles 
were hinged to the rectangular piece. By nailing a 1x8 inch rail 
around outside the top frame and tacking a small cleat on the 
lower face of this frame, a one-and-a-half inch groove one inch 
deep was formed which fitted top rail of the side frames. See 
Fig. 3, Plate XXIV. Hooks and eyes were used to fasten the 
top to the side frames and also to secure the doors. 
This top not only held the frame in shape, but so braced the 
upper portion that it was only necessary to use a few cross 
braces near the base to make the whole rigid. The arrange- 
ment of these cross braces is shown in Fig. 8, Plate XXIV. 
They were made of 1x 2 inch spruce held in place by means of 
eight-inch shutter hinges. The latter allowed of the braces 
being removed when the fumigator was folded. They also 
allowed of the removal of the front brace when placing the 
fumigator around a tree. 
