Harris: 
-- === -q0N 
FACTORS INELUENCING THE WEIGHT OF BEAN SEED 493 
Comparison of correlations between number of pods per plant and 
seed weight with that between number of pods per plant and number of seeds. 
matured per pod in 27 cultures of Phaseolus. 
FIG. 4. 
— .0332 + .0172, 
(.1592 — .1924) + V(.0119)? + (.0124)? 
while that for pods and seeds and pods and weight is 
0265 + .0168. 
(.1592 — .1327) + V(.o119)? + (.0118)? 
Differences in correlations of the order of .03 can ordinarily 
be given little weight. 
In the present instance neither of the 
They can- 
differences is quite twice as large as its probable error. 
not therefore be asserted to represent real physiological differences 
in the closeness of interdependence of the magnitudes of the three 
variables under consideration. 
Not only are the means of the three correlations essentially the 
same, but the variability of the three sets of constants is practi- 
cally identical. 
The values are: 
For pods and ovules per pod, ¢, = .0953 + .0087. 
For pods and seeds per pod, o, = .0906 + .0083. 
