216 FUMIGATION METHODS 
The exposure in each case was one-half hour and one 
hour. ‘The bud sticks were divided into lots, so that 
each variety received the maximum and minimum ex- 
posures of the various strengths of gas. Our bulletin 
contains a number of tables showing the percentage in 
each case of the buds that set, and comparisons are 
made with checks. 
‘‘Tn all, 4,483 buds were treated, of which 78 per 
cent. set. The checks numbered 4,864 buds, 85.5 per 
cent. of which set, making a difference of 7.5 per cent. 
in favor of the checks. A careful examination of the 
tables shows that the gas evidently had no effect upon 
any of the varieties except peaches, which were slightly 
injured by the 0.30 gramme with an exposure of one- 
half hour and one hour. In all cases the growth of the 
treated buds was nearly or quite equal to that of the 
checks. ‘The conditions of the treated buds were not 
quite as favorable, after they had been set into the 
nursery trees, as those of the checks. The treated 
buds were set a little out of season, somewhat later 
than the checks. They were also placed about four 
inches above the checks, where they were too high to 
be protected by the earth thrown against the trees 
during the fall cultivation. They were also placed on 
the furrow side of the trees, thus endangering them to 
injury during cultivation. These unfavorable con- 
ditions were probably, in large part, the cause for the 
failure of the treated buds to set equally as well as the 
checks.”’ 
Sirrine’s folding fumigator.—Another type of 
fumigator has been developed and used by Prof. F. A. 
Sirrine, of the New York Agricultural Experiment 
