replace by adoptions or by pets their unexercised natural affections. Any failure to realize the Divine purpose in this joining together of cause and effect amongst the mass of mankind, any efforts which tend to diminish respect for the parental relation and destroy the perception of its essential sacredness, must be disastrous to the welfare of a nation. The educational influence of parentage as a fundamental fact in human progress must be borne in mind with all the reverence which is due to it, when we seek to remedy the hideous perversions of natural sentiment, which we find in our unhuman slums. It is not by destroying parentage, but by teaching its responsibilities and by restoring its educational influence upon the adult, that we must hope for progress. In seeking to bring into the freedom of humanity, not only the swarms of poor fellow-creatures sweltering in city slums, but all classes of human beings struggling in the slough of unrestrained lust, we must reverently study Nature’s laws as they are gradually discovered in relation to parentage, by which the Creator gradually develops even the lowest forms of mankind through parentage. The fact established by Raciborsky, the famous German physician, in a former generation is that ‘the period when conception is most likely to take place is near the time of menstruation, either just before it or during a few days after the time.’ It is not asserted that conception in the human race is necessarily limited to this interval of time, for it is true that great stimulus of the organs produced at any period of the month may bring about a similar congestion or special aptitude for conception. But the periodic character of the woman’s constitution regulates the probability of conception to so great an extent that by this law higher and lower sentient beings are brought into harmony, and woman assumes her due place as the regulator of sexual intercourse. Throughout the animal world procreation is governed by the will of the female. Not violence, but gentleness, is shown by the male to the female. Her refusal or desire guides sexual intercourse amongst the lower animals. To raise the human race to this higher animal level from which it has fallen is a special task of advanced physiology, which can show the physical method and reason of this redemption. Human marriage must be regarded as a life companionship, in which the satisfaction of physical desires forms a secondary, not a primary, part. When so entered upon, love will direct its relations for the good of the two joined together in this unique union. The man joins himself to the woman in loving companionship, and her constitution henceforward must determine the times of the special act of physical union.