Note (return) — ORGANIC DIFFERENCES IN THE SEXES

All the secondary sexual characters of man are highly variable, even within the limits of the same race; and they differ much in the several races.... Numerous measurements carefully made of the stature, the circumference of the neck and chest, the length of the backbone and of the arms, in various races ... nearly all show that the males differ much more from one another than do the females. This fact indicates that, as far as these characters are concerned, it is the male which has been chiefly modified, since the several races diverged from their common stock.32