2nd. The power of self-adjustment. These two functions, whilst maintaining aptitude for procreation in the activities of ovaries and testes, by occasional spontaneous action secure also the independence of the individual by such natural action. In the exercise of a faculty which requires the concurrence of two intelligent beings endowed with free will and reason, individual independence must be secured. It would strike at the root of human progress, and convert society into slavery, if the life and health of an adult could not be maintained by the self-guidance and independence of the individual. The natural occasional spontaneous action of the structures concerned in reproduction secures individual independence whilst awaiting the beneficial ordinance of marriage. Thus in the female the constant formation of ova is subordinated to the needs of individual freedom and to the power of mental self-government by the function of menstruation, which only in exhausting excess becomes menorrhœa. In the male the slower secretion of semen is adapted to the same individual freedom and power of self-control by the natural function of sperm-emission, which only in exhausting excess becomes spermatorrhœa. As menstruation in the female is the means adopted by our organization for securing both the permanent integrity of the various essential generative structures and their relief from any excess of vitality, so sperm-emission is the natural relief and independent outlet of that steady action of the generative organs in the male, which secures through adult life the constant aptitude for reproduction distinctive of the human race. The parallel in the two sexes is exact. Menstruation and sperm-emission are the natural healthy actions of self-balance, established by the economy for preserving the mastership of each individual over her or his own nature. At the same time the integrity of the structure is maintained by the steady action of these two functions of ovulation and spermation. These natural functions only degenerate into states of disease through ignorance of physiological law and faulty hygienic conditions on the one hand, or through impure thoughts and bad habits acting through the nervous system on the other. When these natural functions are either injured or unduly stimulated through the brain and nervous system, then only do they become diseased, producing menorrhœa or leucorrhœa in the female, and spermatorrhœa in the male.