The general fact that, beyond certain well-defined limits, the activity of the cerebro-spinal system and its relative predominance over the ganglionic, is to be determined dynamically rather than anatomically, is insisted upon by Laycock (Med. Times and Gaz., 1862). This writer observes that the large, slowly-nourished brain of a lymphatic man, frequently evolves much less intellectual force than does the smaller, perhaps more compact, brain of another, in whom the circulation is more active, and the nutrition probably more elaborate.

These facts, and many others that might be quoted, are pertinent to our subject, on account of the influence exercised over the ganglionic centres by the development and functional activity of those of thought. Stimulation of the cerebral hemispheres is one of the most powerful means of counteracting paralysis of the vaso-motor centre, with all its consequences. Habitual activity of these centres—implying, psychologically, habitual activity of thought, physiologically, a more active local circulation—is therefore the best method at our disposal for permanently counteracting tendencies to irregular action in this centre, in the emotional ganglia lying in its vicinity, and in the vaso-motor nerves dependent upon it.

A method of such general supervision does not in itself forbid the co-education of girls and boys; for from this more general point of view, the health of the latter during adolescence really requires precisely the same precautions as that of the former. Attention is less frequently drawn to the precautions required in the case of boys, mainly because such precautions are more frequently observed in regard to them. But besides, girls arrive at the period of adolescence already enervated by the senseless training of their childhood, on which distinctions of sex have been obtruded long before they are established by nature. Finally, since peculiarities relating to the sexual organs are inherited, if at all, from the parent of the same sex,[48] the germs of uterine diseases acquired by mothers too frequently exist in daughters, ready to be developed at the earliest opportunity.

As a matter of fact, therefore, the existing generation of girls, especially in New England, too often possess a delicacy of organization greater than that of their brothers, and demanding a special supervision and watchfulness, best bestowed when they are educated apart. For the reasons already detailed at length, we think that such supervision does not necessitate periodical intermittence of study, except in special cases, that constitute a decided minority among the whole. It does necessitate, however, the more difficult task of providing for adequate rest and exercise during every day of the month. It necessitates a more rational system of study, a more profound training, a more intelligent view of the real character of intellectual life, and of the exercises required to develop it. It necessitates a concentration of intellectual effort into four or six hours out of the twenty-four, instead of a useless diffusion of intellectual peddling over ten or twelve. It necessitates an extension of the term of years allowed for education, and the giving up the fashionable notion that a girl is to be “finished” at seventeen or eighteen, while her brother continues to pursue his studies until twenty-two or twenty-five. It necessitates, finally, the most careful individual adjustment to each different case; and to all its peculiarities, mental, moral, and physical—quite as frequently, therefore, necessitates the education of girls apart from one another as apart from boys.

But this necessity is not permanent. Dr. Clarke himself admits that if the one precaution upon which he insists be observed during the first years of adolescence, it will become unnecessary when the constitution is formed. But neither Dr. Clarke nor his reviewers seem to see that this admission annihilates the only objection made by him to the co-education of the sexes. For that is especially demanded as the only means by which women may be enabled to enjoy a technically superior education, as distinguished from the primary and secondary, and such education does not begin until eighteen. A university education is too expensive to be duplicated in any state; it moreover represents the collective intellectual force of society, and as such cannot rationally be cut in two. Indeed, as such, cannot logically exclude women from men's schools, which are thereby left as imperfect and incomplete as would be the new universities to be constructed exclusively for women. During the neutral period of childhood, girls and boys should be educated together, because, as sex does not, properly speaking, exist, it is absurd to base any distinctions upon it, and the attempt, like all absurdities, is liable to lead to really disastrous consequences. During the period of adolescence or of the formation of sex, it is well to establish a separate education, during which the character of each may be defined and consolidated. This separation is needed by the moral and the physical training rather than by the intellectual. Were it, as is usually assumed, necessary for boys to exercise and for girls to sit still, the need of separation would be much less than it is, for the boys could be sent to the gymnasium while the girls remained in the school room. But systematic exercise is even more necessary for the latter than for the former, because they are likely to take it spontaneously. These exercises must differ in kind and in intensity from those performed by boys, and for this and other reasons, are best pursued alone.

The moral differentiation of the sexes requires separate education, for analogous reasons. Moral differences, though less marked than physical, are more so than intellectual, and any system of education that might be supposed to efface these, would be an injury to society, that requires, not uniformity, but increasing complexity, by means of increasing variety of character among its members. Thus the education of adolescent girls should include certain training in the care of children, and other duties that either permanently, or for the time being, must fall to them and not to boys. But a more important moral reason for separate education consists in the desirability of prolonging as late as possible, the first unconsciousness of sex. At this age the stimulus derived from co-education, acting upon imperfect organizations, is liable to be other than intellectual—liable to excite emotions equally ridiculous and painful from their pre-maturity, and therefore to increase the very danger most to be averted from this period of life—the excessive development of the emotional functions and organs of the nervous system.

But, by the age of eighteen, the reasons against the co-education of the sexes have ceased to exist, and imperative reasons in its favor have come into play. The first we have already indicated. Unless the education of girls be continued beyond the conventional retiring-point of eighteen, and unless they be permitted access to the State Universities, they cannot participate in the highest intellectual education of the race. This cannot be carried on by private teachers, in isolated classes, under uncontrolled authorities. It must be public, national, supreme—for it represents the collective intellectual force of the nation; it is the work of society, and fits for society; and the social influences presiding over its instruction are as important as is the technical knowledge conveyed in its system. Only the best minds should be employed in its service, and in any State these are not sufficiently numerous for the wants of indefinitely multiplied schools.

But, further, if girls may be educated, and better educated, apart from boys, it is scarcely possible to give women an intellectual training apart from men, certainly in the present generation. What may be lost to men by exclusion from the intellectual companionship of women, may perhaps be beyond the scope of our present subject to inquire. But the loss sustained by women, who, shut up in female academies, attempt, or pretend to make the attempt, to obtain a “college education,” is conspicuous beyond possibility of cavil. The same peculiarities that render women, as a rule, less original, are justly said to make them more receptive, more malleable, more exquisitely adjustable to the least variation of external circumstance, or difference in the intellectual calibre of their associates or masters. Their own intellects are quickened to activity or repressed into torpor, by influences that would have little effect upon the less impressionable, more self-poised minds of men. These facts, upon which great emphasis has often been laid, should only lead to one inference, namely, that the education and intellectual capacity of women is likely to remain at the point, or advance to the degree at which men may consider it desirable for it to exist; if, therefore, certain conditions are seen to favor this advancement to an extraordinary degree, and others to retard it in a manner as extraordinary; if, in addition to results already achieved by the increased education of women, others far greater may be foreseen, when that education shall have become really equal to that now accessible to men; it becomes imperative to concede the conditions in question, unless some equally imperative counter indication can be shown to exist. Reasons of an entirely different order exist, we think, in the fact that at this age the sexes naturally seek each other's society, as much as they avoided it before. It is difficult to see why this tendency requires to be counteracted, except on some monastic principle that is an unconscious “survival” from the middle ages. Thwarting this tendency leads often to immorality in the one sex—to languor, and mental, moral, and physical debility in the other.

Dr. Clarke places his counter indication almost exclusively in the supposed necessity for a periodical intermittence in the intellectual work of women, that could not, therefore, be brought into harmony with that of men. But, as we have seen, Dr. Clarke himself admits that such necessity is scarcely imperative except under the age of eighteen or nineteen, and the period of study for which co-education is really desirable, indeed, necessary, does not begin until that age. Moreover, Dr. Clarke draws his examples, not from students who have been educated at mixed schools, but from those who have attended ordinary girls' boarding-schools; so that no proof is adduced of any special influence of co-education, unless the general statement that “co-education is intellectually a success, physically a failure,” can be considered as such proof, which we do not believe. Since, according to Dr. Clarke's own argument, the argument does not apply to the particular point of controversy upon which it has been made to bear with most force, it is superfluous to return to our own reasonings, whereby we believe to have shown that the dangers signalized, though they exist, menace the minority and not the majority; that they are then attributable, not to mental exertion, but to the coincidences of mental exertion as at present conducted; that they are to be averted, not by a single manœuvre, but by a general system of training, that should include, instead of excluding, special attention to intellectual development; that the results of such training would remain, after the consolidation of the physical health and the termination of the period of growth had rendered further training unnecessary; whereas, the peculiar precaution suggested by Dr. Clarke, would rather tend to create a habit of body that would persist throughout life, to immense inconvenience.

Mary Putnam Jacobi.