3. The effects upon the female are even worse than those upon the male; for, in addition to the exhaustion of nervous energy, she is compelled to endure the burdens and pains of child-bearing when utterly unprepared for such a task, to say nothing of her unfitness for the other duties of a mother. With so many girl-mothers in the land, is it any wonder that there are so many thousands of unfortunate individuals who never seem to get beyond childhood in their development? Many a man at forty years is as childish in mind, and as immature in judgment, as a well-developed lad of eighteen would be. They are like withered fruit plucked before it was ripe; they can never become like the mellow and luscious fruit allowed to mature properly. They are unalterably molded; and the saddest fact of all is that they will give to their children the same imperfections; and the children will transmit them to another generation, and so the evil will go on increasing, unless checked by extinction. Mutual Adaptation.--Another question of very great importance is that of the mutual adaptation of the individuals. To this question we can devote but a very brief consideration, and that will be more of the nature of criticism than of a set of formal rules for governing matrimonial alliances. A writer of some note, whose work on this and kindred subjects has had quite an extensive circulation, advocates with great emphasis the theory that parties contemplating marriage should in all cases select for partners individuals as nearly like themselves as possible. Exact duplicates would, in his opinion, make the most perfect union attainable. To make his theory practicable, he is obliged to fall back upon phrenology; and directs that a man seeking a wife, or a woman seeking a husband, should obtain a phrenological chart of his head and then send it around until a counterpart is found. If the circle of one's acquaintance is so fortunate as to contain no one cursed with the same propensities or idiosyncrasies as himself, the newspapers are to be brought into requisition as a medium of advertising. If so strange a doctrine as this were advocated by an obscure individual in some secluded hamlet, or found only in the musty volumes of some forgotten author, it surely would be unworthy of notice; but coming as it does from a quite popular writer, and being coupled with a great amount of really valuable truth, it is sufficiently important to deserve refutation. A brief glance at the practical working of the theory will be a sufficient exposure of its falsity.