" This fact
would be interpreted by the geneticist as an evidence of hybridity. It
is clear that, at the very beginning, a number of diverse, although not
widely differing, stocks must have made up the colonial population; and
intermarriage and the influence of the environment have not welded these
stocks into one blend, but have merely produced a mosaic-like mixture.
This is good evidence of the permanence of inherited traits, although
it must be qualified by the statement that it does not apply equally to
all features of the body, the face, hands and feet having been found
less variable, for instance, than stature and form of head.
[Illustration: THE "MEAN MAN" OF THE OLD WHITE AMERICAN STOCK
FIG. 45.--Anthropologists have an ideal "mean man," whose every
feature measures the arithmetic mean or average of that feature in all
the individuals of his race. The above diagram drawn to scale from Dr.
Hrdli[vc]ka's measurements represents the mean man of Colonial ancestry.
The outline of the face is almost oblong; the head is high and
well-developed, particularly in the regions which are popularly supposed
to denote superior intelligence. In general, it is a highly specialized
type, denoting an advanced evolution.
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