370 
Measurement of Internal Capacity of Skull 
The following results were obtained : 
TABLE I. 
Eace 
Mean C 
Mean P 
rcp 
(a) 
Naqada ^ 
1375 
57,414 
108-52 
4412 
■7492 
Theban^ 
1388 
58,285 
118-01 
4863 
■8576 
(c) 
German (J 
1506 
64,604 
111-54 
4997 
•8587 
{d) 
English (J ... 
1477 
60,860 
122-37 
5206 
•8790 
(«) 
English? 
1300 
53,656 
112-80 
5157 
•8860 
(b) Thebau ^ 
(c) German cT 
(d) English ^ 
(e) English $ 
From these results the following equations flow : 
(a) Naqada ^ Probable C' = 317-2 + •01843P 
Probable G = 174-7 + -02081^ 
Probable C= 267-4 + -01917P \ ^ ^ ^^^"^ 
measured m cm."> 
Probable G = 219-2 + •02067P 
Probable 0= 263-9 + -OigiSP , 
Now from these equations certain results at once flow. It is clear : 
(i) That it is absolutely illegitimate to assume like Dr Beddoe that -4=0. 
(ii) That A varies widely with race and sex, while B varies much less 
markedly, but possibly significantly. This is precisely what we might expect 
had racial differentiation arisen by selection from a common stock. 
Thus Dr Lee's statement that the capacity and circumferences correlations 
varied so much between closely allied races that we could hardly expect to deduce 
a formula true for all races is fully borne out, when we investigate the relation 
between capacity and the circumference product. Dr Lee, after showing that the 
capacity and horizontal and vertical circumference correlations and regression 
equations varied from race to race, remarked : " We conclude therefore that it 
appears unlikely that a reconstruction formula, based on the circumferential 
measurements of the skull, can be found which will give good results, if extended 
from one local race to another*." 
Dr Beddoe has apparently quite misunderstood the nature of the argument 
and simply dismisses the difficulty without meeting it with the words : " Le 
Dr Lee a fait des experiences sur Tare transverse, mais elle a neglige Tare sagittal, 
et ses resultats ne sent guere satisfaisantsf." 
Dr Lee's series seem sufficient for her purpose ; it is the fact that they are 
sufficient but not satisfactory, which Dr Beddoe has no right to shirk. 
If the reader will compare the above male formulae with those obtained for 
three races between the capacity and the diameters' product by Dr Lee|, he will 
* See loc. cit. p. 263. 
t Loc. cit. p. 269. Dr Lee used two arcs, not merely one as is suggested, 
t See loc. cit. p. 243. 
