308 REPORT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
in setting, these bows furnished approximately the same amount 
of space for each tree, no matter what the size and shape, thus 
making it unnecessary to calculate the amount of chemicals 
that must be used for each, and at the same time prevented 
breaking branches and rubbing the buds from them. The extra 
labor of handling combined with their expense would forbid their 
use except in special cases. The small gain in form, and the 
slight advantage acquired by their use for getting a tent on and 
off a tree was too small to be considered. They could not be 
used on frozen ground as it was necessary to sink them into the 
ground one and one-half to two feet. 
Tents made over thirty feet in diameter require special ap- 
paratus for handling, which adds to the expense of the outfit. 
In addition large tents increase rapidly in cost compared to 
size. Forty-foot tents cost between $45 and $50, when made to 
order. 
BOX FUMIGATORS. 
PREVIOUSLY DESCRIBED FORMS. 
One style of box fumigator, with the method of using and its 
advantages, has been described by V. H. Lowe in Bul. No. 181 
of this Station, hence need not be described at this time. 
The only other form of covering for orchard fumigation that 
has been described and is being used at present time, which is 
not simply a variation of the octagonal tent, is the Emory fumt- 
gator designed and described by Prof. W. G. Johnson. This a 
half-box, half-tent affair for which it is just as difficult to esti- 
mate cubic contents as for a tent; furthermore it is more un- 
wieldly than a tent. 
At first Johnson? claimed that his fumigator could be built 
for $12. An attempt was made in 1899 to purchase a set of 
these fumigators. The price asked was $35 each. In a later 
publication? Johnson puts the cost of construction at $30 apiece. 

*U. 8. Dept. Agr. Div. Ent. Bul. No. 20, n. s., pp. 48-45, 1899. 
et 
’Rural New-Yorker, Jan. 20, 1900. 
