CHAPTER XT 
EQUIPMENT FOR FUMIGATING NURSERY STOCK 
HE enclosure necessary for fumigating purposes 
| in nurseries varies considerably. In some 
cases boxes will accommodate the grower, 
but the building is usually constructed in 
accordance with the number of trees grown or handled. 
Some nurserymen have found it necessary to construct 
a house large enough to hold 12,000 to 15,000 first- 
class trees at one time. Some firms handling a million 
or more trees annually have rooms large enough to 
admit a wagon-load of trees at one time, examples of 
which are given in Figs. 52 and 64. 
A good tent, such as isseen in Fig. 12, can be used 
in cases of emergency, but it is not advisable to de- 
pend upon a tent altogether. Many nurserymen have 
found a small box tent, similar to the one shown in 
Fig. 32, very useful. Still others have used a sheet 
tent over a wagon-load of trees to good advantage. 
There are some objections to a tent or box covered 
with canvas; in the first place, by constant use it is 
liable to be torn, and, secondly (and most important), 
the cubic capacity of space enclosed under a sheet tent 
will vary with the amount of stock fumigated. Herein 
lies the greatest source of error, inasmuch as the 
chemicals must be weighed every time for each indi- 
vidual lot of trees treated. Where the box or Emory 
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