CHAPTER VIII 
EMORY FUMIGATOR WITH MODIFICATIONS 
FTER much experience with sheet tents in East- 
ern orchards, and while confident the gas 
could be used to good advantage, it was evi- 
dent to the writer the method would have to 
be simplified before it could be used by the average 
fruit grower. The main difficulty was in the calcula- 
tion of the cubic contents of a tented tree and the 
measurement of the chemicals afterward. The folds 
in a tent over a tree are so extremely variable it is 
almost impossible to calculate the cubic contents, even 
approximately. As the success attained by this 
method depends entirely upon the exactness with 
which the operation is performed, it was therefore 
necessary to find a system less variable for deciduous 
trees. 
First of all, a method by which the cubic contents 
could be kept nearly constant, and one that could 
be applied without the wear and tear upon the 
tree by the tent, resulting in the destruction of so 
many fruit and leaf buds, was desirable. After much 
thought and consideration, it seemed that both ob- 
jections to the sheet tent system could be overcome by 
the construction of a box with a square base, varying 
in hight to suit conditions and having a canvas hood. 
It was also necessary to cheapen the cost of the equip- 
ment, if possible. 
Light wooden frames were constructed and covered 
59 
