A QUANTITATIVE STUDY OF THE RESEMBLANCE 
BETWEEN MAN AND WOMAN. 
By E. TSCHEPOURKOWSKY, Moscow. 
In my studies on the cephalic index, wliich are partly published in Russian and 
partly in German journals, I affii'm that sexual selection plays a very important ?-o/e 
in the development of its varieties. Since then I have collected from different sources 
a certain amount of data for the study of interracial and sexual correlation, which 
can possibly give an answer to the following question: "If different characters of 
the human frame are inherited and if we admit that some of them are the result 
of natural selection, then the environment — in a wider sense — not being the same 
for both sexes we may expect that some characters are characteristic for one sex 
only. How far are they inherited in comparison with others by the opposite sex ? " 
We may suppose d priori that the cephalic or nasal index has not the same 
importance in the struggle for life as for instance the arm length. If all kinds of 
characters are inherited equally by both sexes, the coefficients of correlation 
of their male and female values in different races must be equally high for 
them all. 
In order to investigate this point I have used the data of various Russian 
authorities for living subjects ; firstly, because they are collected in a very uniform 
manner, and secondly, because the diversity of races within the large territory of 
Russia is itself sufficient. The work of collecting the data was very much 
facilitated by the new compilation of Iwanowsky : " Anthropological Constituents 
of the Population of Russia." The raw material is represented in the tables 
given below in which the number of cases and the authors' names are also 
indicated. The numerical values for crania which I have used are partly extracted 
fi'om different authors but mostly deduced from my own measurements made in 
the various anthropological museums of Europe. The cross-correlations can also 
be studied from these tables by anyone who wishes to do so*. 
* See the remark on the next page. 
Biometrika iv 21 
