e conclusion
would be that, in the course of a few centuries, the brain had grown
considerably. A measurement by Broca of skulls from the Stone Age
resulted, however, in an average of 1,606 cubic centimeters for the
skulls of men, and 1,581 for the skulls of women,--accordingly, both
considerably larger than those of the eleventh, twelfth and eighteenth
centuries. Mrs. Nadejde concluded therefrom that Herbert Spencer was
right when he claimed in his physiology that brain weight depended upon
the amount of motion and the variety of motions.

The lady furthermore emphasized the point that it depends a deal less on
the brain-mass than on the proportion in the two sexes of the
brain-weight to the weight of the body. Proceeding from these premises,
it appeared that _the female brain was heavier than the male_. The
argument on this head, Mrs. Nadejde presents in these words:

"Let us compare the average weights of the bodies, and let us take, as
the difference between man and woman only 8 kilograms, although many
naturalists, among them Gay, whom Delaunay quotes, takes 11 kilograms.
According to the average weights of 9,157 American soldiers: 64.4
kilograms (average weight of the male body): 56 kilograms (average
weight of the female body) = 1,141 or 1.14, i. e., the average weight of
woman being taken as 100, that of man is represented by 114. According
to the average weights of 12,740 Bavarians: 65.5 kilograms (average for
males): 57.5 (average for females) = 1,139 or 1.14 as above. Assuming
the average weight of woman as 100, that of man is found to be 114.
According to the average weights of 617 Englishmen, 68.8 (average for
males): 60.8 (average for females) = 1,131, or 1.13; the average weight
of woman being assumed as 100, that of man is found to be 113.[135]

"Accordingly, it appears that, under otherwise equal conditions, women
have 1/4 per cent. of brain-mass in excess of men. That is to say, for
every 100 grams of female brain-mass, men should have 113 or 114 grams;
in reality, however, they only have from 110 to 112 grams. The fact can
be put still more plastically: According to this calculation, _the male
brain falls short 25 to 51 grams of brain-mass_.[136]

"But L. Manouvrier proves more. He says:[137] 'The influence of the
weight of the body strikes the eye when we note the figures among the
vertebrates. The influence is equally manifest with man, and it is a
wonder how so many naturalists have not yet reco