402 BOTANICAL GAZETTE [MAY 
TABLE XV, 1906 
LENGTH OF FRUIT 
aia bs 3 | 4 | a 6 7 8 | 9 | 10 | II | Totals 
| 
bee ee oe I ee I 
Be sce 8 36 44 59 40 26 8 I 222 
S250. 2 I 22 167 127 66 41 8 517 
Pega 2 38 120 166 ri? 73 28 fe) 549 
LG ne I 40 fee) 115 88 42 7 2 385 
Pets seni s I 31 65 61 34 14 6 2 215 
Woe ss 2 20 20 21 7 4 I 75 
Lea De I I 13 28 10 3 PS 56 
OG 2 2 4 I 9 
TOC Bie Ss 3 z 2 . 9 
2 haven tne e ee SS a 
ip pean ae : 3 4 4 I 12 
Totals 6 | 142 437 610 | 462 248 112 32 I 2050 
fruits developing on an inflorescence, we should expect a positive 
correlation between number of seeds developing and length of pod, 
due to no direct physiological interdependence of the two, but 
solely to their correlation with these other characters. Turning 
to our data, we see the correlation surface for position and seeds 
per locule in table XVI, 1906, and between number per inflorescence 
and seeds per locule in table XVII, 1906. To the eye there seems 
to be little or no correlation. The calculating machine shows: 
For position of fruit and seeds, r,;= —0.0148+0.0149 
For number of fruits and seeds, r,,= —0.0474+0.0148 
Again the signs are negative, but the values are so low that 
little importance can be safely attached to them. 
With such low correlations, it seems hardly worth while to 
consider the amount of influence which position on the inflorescence 
or number of pods per inflorescence would have upon the degree 
of interdependence of s and J, but since biometricians are frequently 
criticized for neglecting just such biological considerations as this, 
I calculated the correlation for seeds and length for constant 
numbers of pods per inflorescence. Number rather than position 
was chosen, since the correlations are numerically higher and will 
have greater influence on 73. Working from the formula 
Ta—Tns + Toi 
Psi = Vv 1—7,2 Vv i—7 ? 
