The average human male brain is said to weigh from 1,300 to 1,400 grammes, and even a very young whale furnishes 2,312 grammes of "intellect-producing substance," as the doctor felicitously terms it, while the brain of a large whale weighed in 1883 tipped the beam at 6,700 grammes. Truly, then, if absolute brain weight and not relative weight is the test, here was a "mute inglorious Milton," indeed. Almost any elephant is several Cuviers in disguise, or perhaps an entire medical faculty.
The doctor says: "The female brain, however, is not only smaller than that of man, but it is different in structure, and this fact involves much more as regards the character of the mental faculties than does the element of size." Again he says: "Thus accurate measurements show that the anterior portion of the brain, comprising the frontal lobes, in which the highest intellectual faculties re side, is much more developed in man than in woman, and this not only as regards its size, but its convolutions also. Now, the part of the brain which is especially concerned in the evolution of mind is the gray matter, and this is increased or diminished in accordance with the number and complexity of the convolutions. The frontal lobes contain a greater amount of gray cortical matter than any other part of the brain, and they are, as we have seen, larger in man than in woman."
Accepting these sweeping statements for the moment--although many of them are questioned by the highest authority--would it not be fair to test the case as to whether this difference in adults is fundamental and pre-natal, or whether it is the result of outside artificial influences, by an appeal to the brain of infants. If the brains of one hundred infants (each child weighing ten pounds) were examined, would the brains of the fifty males be distinguishable from those of the fifty females? In other words, when the weight of the body, the age, and other conditions are the same as to health, parentage, etc., and before the artificial means of development, educational stimulus and opportunity are applied to the one and withheld from the other, could the sex be determined by the difference in brain, weight, shape, size, quality, or convolutions? That would be the test, although it would not allow for the ages of hereditary dwarfage of the one, and healthy exercise of the brains of the other sex; but, as an opening, I was willing to stand on that test. It was in pursuance of this idea that I caused the following questions to be submitted to a large number of the leading brain students of America, went myself somewhat into the study of anthropology, and collected from several countries certain bits of information as to just how much basis there is for all this cry about the difference in men's and women's brains.