Harris, Observations on the Physiology of Seecl Development in Staphylea . 5 
we expect r nf to be positive in most cases, and find one fourth 
only to be negative. 
Table 1. 
Shrub 
r 
l no 
Number of 
Fruits and 
Number of 
Ovules 
1* ns 
Number of 
Fruits and 
Number of 
Seeds 
nf 
Number of 
Fruits and 
Number of 
Ovules Failing 
11 
—.093 
.035 
.000 
12 
.131 
.060 
.055 
13 
-.075 
—.090 
.022 
14 
—.053 
— .082 
.103 
15 
—.041 
—.042 
—.009 
16 
—.012 
—.054 
.025 
17 
.173 
—.031 
.159 
18 
.178 
—.001 
.069 
19 
.038 
-.058 
.066 
20 
—.111 
—.056 
-.029 
21 
.010 
-.024 
.025 
22 
—.061 
— .138 
.105 
23 
—.081 
.003 
-.060 
24 
-.017 
— .062 
.006 
25 
.096 
.062 
.005 
26 
—.138 
—.067 
—.044 
27 
—.108 
—.007 
—.075 . 
28 
.357 
—.035 
.243 
29 
.093 
—.083 
.127 
30 
.097 
— .128 
.163 
For all the pods collected for each year, we fiave: 
Number per Inflorescence and Ovules per Locule: 
1906. Table III, r = . 0391 ± . 0086, rlE r = 4.6. 
1908, Table IV, r = . 0633 ± . 0061, r\E r = 10.4. 
1909, Table V, r = — . 0539 ± . 0085, r\E r = 6.3. 
Number per Inflorescence and Seeds per Locule: 
1906, Table VI, r = — . 0474 ± . 0086, rj E r = 5.5. 
1908, Table VII, r= — . 0494 ± .0061, rlE r = 8. 1. 
1909, Table VIII, r = . 0626 + . 0085, r/E r = 7.4. 
Judged by the probable errors these constants might, taken 
individually, be regarded as statistically significant. We must note, 
however, that: 
a) We have taken the number which gives the lowest pos- 
sible probable error, and that if we used the number of fruits 
instead of the number of locules, the probable errors would be 
nearly doubled. 
b) When very high or very low correlation coefficients are 
in hand, too great stress cannot be laid upon the probable errors. 
c) The numerical valnes are too low to be of any practical 
biological significance, and positive and negative coefficients occur 
for both relationships. 
