96 FUMIGATION METHODS 
slipped through the mortices in the uprights, and are 
keyed down to force the top down tight. Nine inches 
from the bottom of the box put ina false slat bottom, 
made in sections, so it can be removed to clean out 
dirt from bottom of box. ‘The chemicals are placed in 
a little shallow dish and put into the box through the 
little door, 4, which has a shutter keyed up tight to 
side of box. 
Another handy box, devised by a Canadian nurs- 
eryman, is made of double matched sheathing with 
a SSS 
i —— 
ian 
4 
ets 
es 
Fig h Md ~ 
FIG. 49—THE OPEN BOX USED IN SOME MARYLAND NURSERIES 
(ORIGINAL) 
tarred paper between. ‘The top is held tightly against 
the felt padding by driving the wooden hooks from an 
upright into a slanting position. ‘The hooks are made 
of hard wood pieces 1 x 3 inches, cut soas to hook over 
the edge of the lid and under the long side strip. ‘The 
rack in the bottom of the box keeps the trees away 
from the chemicals and insures a thorough penetration 
of the gas. ‘This box is shown in Fig. 48. 
A plain box, 6x3 x 2% feet is very satisfac- 
tory for small orders. It should be made of two 
thicknesses of common flooring. The construction is 
