nsists of both
sexes; both are indispensable to its existence and progress. Even the
greatest male genius was born of a mother, to whom frequently he is
indebted for the best part of himself. By what right can woman be
refused equality with man?

Based upon information furnished us by a medical friend, we shall here
sketch with a few strokes the essential differences, that, according to
leading authorities, manifest themselves in the physical and mental
qualities of man and woman. The bodily size of man and woman stands, on
an average, in the relation of 100 to 93.2. The bones of woman are
shorter and thinner, the chest smaller, wider, deeper and flatter. Other
differences depend directly upon the sex purpose. The muscles of woman
are not as massive. The weight of the heart is 310 grains in man, 255 in
woman.

The composition of the blood in man and woman is as follows: Water, man,
77.19; woman, 79.11. Solid matter, man, 22.10; woman, 20.89. Blood
corpuscles, man, 14.10; woman, 12.79. Number of blood corpuscles in a
cubic millimeter of blood, man, 4 1/2 to 5 millions; woman, 4 to 4 1/2
millions. According to Meynert, the weight of the brain of man is from
1,018 to 1,925 grams; of woman, from 820 to 1,565; or in the relation of
100 to 90.93. LeBon and Bischoff agree that, while weight of brain
corresponds with size of body, nevertheless short people have relatively
larger brains. With woman, the smaller size of the heart, the narrower
system of blood vessels and probably also the larger quantity of blood,
has a lower degree of nourishment for its effect.[133] That, however,
the larger skulls of larger persons, coupled with the quantitative
changes occasioned by the size of the skull promote the vigor of the
several sections of the brain is a matter that _cannot be
asserted_.[134]

Of 107 mentally healthy men and 148 women of the ages of 20 to 59, the
weight of the brain per thousand was:

Average
Medulla Length in
Sex. Oblongata. Cerebellum. Pons. Centimeters.

Men 790 107.5 102 166.5
Women 787 110.0 103 156.0

The absolute and relative excess in the weight of the cerebellum of
woman has an enormous significance. With animals that run immediately
upon birth, the cerebellum is much more powerfully developed than with
animals that are born blind, are helpless, and that learn