CHAPTER VIII 

 EMORY FUMIGATOR WITH MODIFICATIONS 



FTKR 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. 



lyight wooden frames were constructed and covered 



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