64 FUMIGATION METHODS 
as we could expect it, and we began work to overcome 
the two serious objections. First, a box with a per- 
manent hood, and, secondly, one that could be handled 
without being opened on the sides was needed. At the 
same time, while we found the rawhide paper perfectly 
satisfactory on the large box, it was quite trouble- 
some to put on the frame smoothly. The edges were 
first glued and then nailed. It was also easily punc- 
tured by a broken limb unless great care was taken. 
This last point was not a serious objection, and little 
or no trouble was experienced on that account. A 
material, however, with more elasticity was desir- 
able. 
Taking all these points into consideration, a box 
of the same dimensions, covered with eight-ounce 
ducking, was constructed. The sides were screwed to- 
gether, and the hood fastened on permanently with 
narrow strips screwed to the top of the aaa as 
shown in Fig. 32. 
Having completed this box, the most serious obsta- 
cle arose. How could a box of such dimensions, with 
permanent hood and sides, be handled? ‘There was 
only one way to do it, and that was to pick the box 
up and lower it over the top of the tree. The prob- 
lem was solved by the ingenuity of Robert S. Emory. 
It was accomplished by means of a thirty-five foot 
mast made of spar pine and a twelve-foot gaff of the 
same material. It was fitted with ropes and pulleys, 
and rigged to the running-gear of an ordinary farm 
cart, as shown in Fig. 35. By means of this it could 
be raised and lowered over any tree under seventeen 
feet in hight. The system worked perfetly, and was 
