I am quite aware that I am treading on dangerous and delicate ground, but although I would not discourage the highest aspirations of women, whether of an intellectual, social, or æsthetic character, I must think that a word of caution is necessary against the overpressure of the present day in the direction above indicated.[15] With every desire to treat this question from a liberal point of view, I desire to emphasise the fact that men and women have different parts to play on the stage of life, and should be trained differently; but provided mental overpressure is guarded against, I have no fear of women engaging in certain occupations which custom has not hitherto recognised as feminine, and experience has shown us that they may be safely left to follow the promptings of their own powers and instincts. * * * * * Amongst the various other predispositions to idiocy, I would mention scrofula, which, according to Dr. Ireland, is the remote cause of two-thirds of all cases; phthisis and epilepsy in the parents are also potent factors in the development of idiocy in their offspring. * * * * * Before quitting the question of the cause of idiocy, I should like to say a word or two about what is technically called its histology and its pathological anatomy. What is there in the brain that makes one man a senior wrangler and another an idiot? What is it that unfits one person for the discharge of the ordinary duties of domestic and social life, and endows another with capacities adapted for a statesman, a mathematician, or a philosopher? Is it a defect in the quantity or in the quality of the nervous matter of the brain? Does it depend on a malformation of the cranium, on the size or shape of the head? does the form of a cranium illustrate the quality of the mind whose cerebral substratum it encloses, or can genius of a high order enshrine itself in a comparatively narrow and malconstructed tenement?[16] Does mental capacity depend on the size or weight of the brain, or on the degree of complexity of the cerebral convolutions, or on their symmetry in each hemisphere?[17] Upon this point, I am bound to tell you that science speaks with a somewhat uncertain sound, volumes having been written upon it without any definite solution or tangible result. An eminent Italian psychologist, Dr. Mingazzini, in a recent work on the study of the cerebral convolutions, shows that in men of genius, the brain offers no certain indications of intellectual eminence, either by the greater richness of the frontal or the parietal lobes; and in support of this opinion he cites the researches of Wagner, which showed that, in the development and richness of the convolutions, the brains of many celebrated Gottingen professors were inferior to those belonging to individuals of low intellectual capacity.[18]