races of the United States is also
extended to sexual life, and that we cannot discover the fundamental
differences between the Irish, Scandinavians, French, Germans and
Italians who constitute this mixture. But it is possible that this is
only a superficial impression, and that a deeper study of the details
would lead to another result. One thing appears to be unquestionable
in the negro race; that is the violence of its sexual passion combined
with its mental inferiority.

A striking trait is furnished by the French race which has remained
pure in the eastern provinces of Canada, whose sexual customs are very
different from those of the present population of France. The French
Canadian is extremely pure and chaste, leads a regular life and has a
numerous family. Families of fifteen or twenty are not rare among
French Canadians. We can here, therefore, observe the effect of
climate and custom on a single race. For reasons mentioned above, I
shall content myself with a few remarks, but I am certain that a
profound study of the question would discover, in the character of the
individuals, specific peculiarities of their race which are only
marked externally by customs. It is obvious that such characters will
be all the more distinct, the more the race differs from its
congeners, and the purer its ethnical separation. As among animals, it
is necessary to distinguish between slight variations, and races or
sub-species which are more constant and more divergent. Hereditary or
phylogenetic individual differences must also be distinguished from
those of races or varieties.

=Weight of the Brain in Different Races and Sexes.=--Bebel has stated
that among savages the difference between the brain of the men and
women is less than among civilized people. This statement is quite
wrong. Prof. Rudolph Martin, of Zurich, has given me statistics of the
cranial capacity of the two sexes in different races, drawn from
reliable sources. According to Martin the weight of the brain
represents about 87 per cent. of the cranial capacity. His table of
statistics is given on the opposite page.

These figures show that the difference between the two sexes is always
about the same, while the average absolute weight of the brain in the
two sexes is lower in the lower races. Reckoning it 87 per cent. of
the cranial capacity, it is in the Weddas 1111 grammes for males and
991 grammes for females, which corresponds to the weight of the
brains of