The notion that women are by nature mentally inferior to men, is primarily due to the fact that their enforced ignorance made them appear inferior. This is one of the strongest superstitions concerning women, as it is also one of the oldest. It has been much weakened by modern experience, but it has by no means disappeared. Indeed, it has stood in the way of dispassionate scientific study of the relative mental capacity of the sexes. Havelock Ellis, in his “Man and Woman,” says that “the history of opinion regarding cerebral sexual difference forms a painful page in scientific annals. It is full of prejudices, assumptions, fallacies, over-hasty generalizations. The unscientific have a predilection for this subject; and men of science seem to have lost the scientific spirit when they approached the study of its seat.... It is only of recent years that a comparatively calm and disinterested study of the brain has become in any degree common; and even today the fairly well ascertained facts concerning sexual differences may be easily summed up.” He then proceeds to show that those differences are few. It might be remarked here that such actual differences as appear are differences between man and woman as they now are, and can not be taken as final. If brain-mass, for example, depends to some extent on physical size and strength, the mass of woman’s brain should tend to increase as she abandons her unnatural seclusion, engages in exacting occupations and indulges in vigorous physical exercise. Already there has been an astonishing change in the female figure. An interesting indication of this is a recent dispatch from Germany stating that according to the shoe-manufacturers of that country the average German woman of today wears a shoe two sizes larger than the woman of a century ago. If woman’s body tends thus to enlarge with proper use, so in all likelihood will her brain.