DE. A. LEE AND PEOFESSOli K. PEAESON OX 
234 
formulae involving the length give, on the whole, a lower probable error in the value 
calculated for the capacity ; in the latter race we must replace in this statement 
length by breadth.* 
Table 
V. 
Probable 
Formula; for Aiiio males. error of mean. 
(0 
C = 
15-130 L - 1349-05. 
30-57 
Vn 
(•-^) 
C = 
14-472 B - 582-24 . 
56-19 
y'n 
(3) 
c =. 
12-511 H - 31-21. 
56-92 
\/n 
(b 
c = - 
12-907 I -f 2449-00 . 
64-58 
\/n 
(5) 
c = 
13-555 L + 5-562 B - 1842-61 . 
27-58 
v/re 
(6) 
c = 
14-029 L + 2-984 H - 1501-23. 
29-61 
v/« 
(/) 
c = 
10-921 B + 9-153 H - 1172-95. 
50-14 
•/n 
(8) 
c = 
12-857 L + 5-171 B + 2-190 H - 1919-24 . 
27-02 
s/n 
(9) 
c = 
-000328 (L X B X H) 4- 430-30. . . . 
42-89 
\/n 
Capacity is measured in cubic centims.,and length, breadth, and height in millims. 
n — number from which C is determined. 
1 = cephalic index = 100 B/L 
* Dr. Franz Boas {hr. df., p. 461) states: “The relation between capacity and head-diameters is 
found to 1)C of fundamental imjiortance, and among these the relation between transversal diameter and 
ca|tacity is most significant.” This, 1 thiidc, is only true for fairly brachyccphalic races. He is dealing 
■with S7 Sioux Indian skulls with ceplndic index = 79. 
