"Libidinous Blood.-In no other direction are the effects of heredity to be more distinctly traced than in the transmission of sensual propensities. The children of libertines are almost certain to be rakes and prostitutes. History affords numerous examples in illustration of this fact. The daughter of Augustus was as unchaste as her father, and her daughter was as immoral as herself. The sons of David showed evident traces of their father’s failing. Witness the incest of Amnon, and the voluptuousness of Solomon, who had seven hundred wives and three hundred concubines. Solomon’s son was, likewise, a noted polygamist, of whom the record days, “He desired many wives.” His son’s son manifested the same propensity in taking as many wives as the debilitated state of his kingdom allowed to trace the origin of this libidinous propensity still further back. A glance at the geneology of David will show that he was descended from Judah through Pharex, who was the result of an incestuous union between Judah and his daughter-in-law. It is unreasonable to suppose that the abnormal passion which led David to commit the most heinous in of his life in his adultery with Bath-sheba and subsequently procuring the death of her husband, was really an hereditary propensity which had come down to him through his ancestors, and which under more favorable circumstances, was more fully developed in his sons ? The trait may have kept dormant by the active and simple habits of his earl years, but asserted itself in full force under the fostering influence of royal indleness and luxury. In accordance with the known laws of heredity, such a tendency would be the legitimate result of such a combination of circumstances. The influence of marital excesses, and especially sexual indulgence during pregnancy, in producing viscious tendencies in offspring, has been fully dwelt upon elsewhere in this work, and will be considered here, it being only necessary to call attention to the subject. Physiology shows conclusively that thousands of parents whose sons have become libertines and their daughters courtesans, have themselves implanted in their characters the propensity which led to their unchastity."