1922] JOHNSTON—PEACH BUDS 319 
The other temperature data in table I were also plotted against 
the corresponding moisture values, but are not presented in graphic 
form. ‘The curves obtained by using the physiological indices were 
practically straight lines, and quite similar to those obtained from 
the daily mean temperatures above 43°F. The relationship be- 
tween the moisture and the exponential indices, however, was not 
linear. 
The data of table I have been rearranged so that the first reading 
of each measurement for each year is zero and the last unity. 
Within this range it is somewhat easier to compare the propor- 
tionate amount of change in each measurement. These data are 
presented in table IT, and in the form of graphs in fig. 2. The close 
agreement between the moisture and the temperature indices 
representing the summation of daily mean temperatures above 
43° F. is readily seen. ' 
Conclusions 
It is realized that the observations discussed in this paper are 
somewhat limited in number, but nevertheless they suggest a 
definite relationship between air temperature and the rate of 
increase in the moisture content of peach fruit buds. There can 
be little doubt, however, that other conditioning influences are 
operative before January 1, that determine the manner in which 
these buds responded to temperature. 
AGRICULTURAL EXPERIMENT STATION 
UNIVERSITY OF MARYLAND 
CoLLEGE Park, Mp. 
