Harris, A quantitative study of tlie factors influeneilig etc. 
9 
We pass at once to the end results — the correlations x ) 
between the distance which a seed is from the insertion of the 
pod (in units of the interval between ovules) and the weight of 
the seeds. As seen in Table V, the correlations are uniformly 
low, but all 20 are positive and the most of them may be looked 
upon as statistically significant in comparison with their probable 
errors. Biologically, this means that from the proximal end to the 
distal end of the pod, the seeds become slightly heavier. The 
rate of this change throughout the whole material is shown by 
Table V. 
Series 
and Ovules 
per Pod 
Number 
of Seeds 
Correlation 
Coefficient 
r 
Correlation 
Ratio 
V 
Difference 
Blakeman’s 
Criterion 
Series L 
3 
70 
.214+ .077 
.250+ .076 
.036 
.82 
4 
583 
.099 + .028 
.118+ .028 
.019 
1.15 
5 
1444 
.166+ .017 
.171+ .017 
.005 
1.15 
6 
740 
.155 + .024 
.192+ .024 
.037 
2.34 
Series LL 
3 
87 
.238 + .068 
.270 + .067 
.032 
.90 
4 
527 
.157 + .029 
.161+ .029 
.004 
.54 
5 
1973 
.147+ .015 
.155 + .015 
.008 
1.53 
6 
1264 
.151+ .019 
.163+ .018 
.012 
1.62 
Series NH 
4 
217 
.014+ .046 
.116 + .045 
102 
1.28 
5 
1597 
.136+ .017 
.181+ .016 
.045 
3.57 
6 
3148 
.176+ .012 
.213+ .011 
.037 
5.03 
7 
Series NH 
776 
.108 + .024 
.181+ .023 
.073 
3.05 
3 
287 
.109.+ .039 
.132 + .039 
.023 
.95 
4 
1559 
.121 + .017 
.148 + .017 
.027 
2.47 
5 
486 
.159 + .030 
.193+ .029 
.034 
1.80 
Series GG 
4 
421 
.114+ .032 
.131 + .032 
.017 
1.00 
5 
1958 
.105 + .015 
.111+ .015 
.006 
1.14 
6 
3393 
.093 + .011 
.095 + .011 
.002 
.83 
7 
1996 
.096 + .015 
.102+ .015 
.006 
1.09 
8 
510 
.073 + .030 
.140+ .029 
.067 
2.03 
the magnitude of the correlation coefficient. Whether or not the 
rate of change in weight is uniform throughout the whole ränge 
of proximal to distal may be tested graphically by the fitting of 
a straight line eqnation to the means of seed weight for each 
Position.. Using the conventional formula 
W = (W — r 
10 
O 
V 
. 6 w 
p) + r — 
p 
where tv — weight, p — position or units of distance from the 
i) Here calculated without the application of Sheppard’s correction to 
the second moinent for seed weight. The uncorrected value is used in obtaining 
the Standard deviations in Order that r and rj, to be discussed later, may be compared. 
