Miscellanea 
189 
Taking first the male slculls, tiie mean value of the capacity and the product BLH, their 
standard deviations and the correlations are given in the following tabic. 
TABLE I. 
Mean capacity 
in cm. 3 
Mean value of 
BLH in cm.-' 
(Tp in cm.^ 
cm. 3 
' c, BLH 
46 Congo Skulls ... 
1344 
3303 
126-22 
282-99 
-872 
48 Gaboon (1864) ... 
1379 
3295 
108-30 
230-30 
-822 
16 Gaboon (1880) ... 
1447 
3463 
109-60 
266-42 
-808 
110 Negro skulls ... 
1375 
3323 
120-74 
265-20 
-842 
The corresponding regression lines are 
for the 46 Congo 
48 Gaboon (1864) 
16 Gaboon (1880) 
110 male negro skulls 
<7=-00038895Zfi'+ 59 ± 
C= ■0003865BLH+ 105-5 ± 
C= 00033235Z/i(^+297 ± 
41 
62 
65 
•(1), 
■(2), 
.(3), 
C= -0003849 96 ± 
65 
.(4). 
Lee and Pearson's corresponding equation for males is 
C= momQLBH' + 524-6* (P). 
This is not a regression line, but is obtained by method of least squares from the results for 
various races in their table 20. 
The fornmlae 1 — 4 can be used to predict the capacity of an individual skull from external 
measurements. The probable errors of the mean were calculated by the formula 0-67449(rc 
where n is the number of skulls in the group to which the formula is a])plied. If we substitute 
in (1)— (4) the mean values of B, L, H for the Bavarian male skulls used by Lee and Pearson, 
viz. : 
5=150-5, 
L = 180-6, 
^=133-8, 
we obtain, from (1), 
„ (2), 
„ (3), 
- (4), 
41 
C=1474±^L 
sin 
(7=1471 ±^ 
V n 
(?=1506±~ 
65 
6"= 1496 ± 
Loe. cit. Equation (12). if' = total heiglit. 
