EQUIPMENT FOR FUMIGATING NURSERY STOCK 97 
shown in Figs. 49 and 50. Itisasimple, plain, open 
box, and when filled with young trees, kept in place 
by a couple of slats, a, it is turned bottom upward 
on the ground and a little loose earth isstamped about 
the edges. ‘The chemicals can be easily introduced by 
tilting the box slightly, as shown in Fig. 50. It is 
less troublesome than boxes having lids, and can be 
used to very good advantage in most cases where 
small numbers of trees are grown. 
A fumigatorium is a house or room constructed or 
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FIG. 50—OPEN BOX REVERSED READY FOR CHEMICALS 
(ORIGINAL) 
adapted for the fumigation of nursery stock or other 
material with hydrocyanic acid or other gases. It is 
not necessary in all instances to construct a separate 
building for this purpose. In most cases where a nurs- 
ery has been established some years a shed or one 
corner of a building, packing-house, or other enclosure, 
can be adapted so as to make a satisfactory room or 
house for fumigating purposes. Cover the frame 
inside with cheap boards; then put on three-ply cyclone 
or rawhide building paper, and finally the flooring. 
In every case have a good smooth surface on which to 
