New York AGRICULTURAL EXPERIMENT STATION. 653 
Fa 
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For the purpose of comparing the effects of treatment at dif- 
ferent periods in the season, the treated trees were divided into 
four sections, namely: 
Section I, containing 20 Seckels. It was given treatments 1, 
2, 3, 4 and 5. 
Section II, containing 14 Seckels. It was given treatments 1, 
2, 3 and 4. 
3 Section III, containing 8 Seckels. It was given treatments 2, 
8, 4 and 5. 
Section IV, containing 17 Seckels. It was given treatments 2, 
5 and 4. 
Section V, containing 18 Seckels. It was left untreated for 
comparison with I and II. 
# Section VI, containing 24 Seckels. It was left untreated for 
comparison with III and IV. 
_ All trees in the experimental block were treated alike through- 
out the season, except with regard to spraying. The spraying 
was done on the following dates : 
1. April 25, immediately after the fruit buds” began to open. 
See figure 1, plate II. 

12 Those who have watched the opening of pear buds will rememb=r that the buds commonly 
called ‘fruit buds” open first, disclosing slender leafy bracts and a cluster of blossom buds, 
as shown in figurei. At this time the leaf buds show green only at the tips where they are 
breaking through the bud scales. The length of time that elapses between the opening of the 
fruit buds and the opening of the blossoms varies according to ths weather conditions, but in 
this latitude it is usually about 10 days. 
