and of happiness? Then there were special problems; one among others, the mystery of which had for a long time irritated him, that of sex; would science never be able to predict, or at least to explain the sex of the embryo being? He had written a very curious paper crammed full of facts on this subject, but which left it in the end in the complete ignorance in which the most exhaustive researches had left it. Doubtless the question of heredity fascinated him as it did only because it remained obscure, vast, and unfathomable, like all the infant sciences where imagination holds sway. Finally, a long study which he had made on the heredity of phthisis revived in him the wavering faith of the healer, arousing in him the noble and wild hope of regenerating humanity. In short, Dr. Pascal had only one belief—the belief in life. Life was the only divine manifestation. Life was God, the grand motor, the soul of the universe. And life had no other instrument than heredity; heredity made the world; so that if its laws could be known and directed, the world could be made to one’s will. In him, to whom sickness, suffering, and death had been a familiar sight, the militant pity of the physician awoke. Ah! to have no more sickness, no more suffering, as little death as possible! His dream ended in this thought—that universal happiness, the future community of perfection and of felicity, could be hastened by intervention, by giving health to all. When all should be healthy, strong, and intelligent, there would be only a superior race, infinitely wise and happy. In India, was not a Brahmin developed from a Soudra in seven generations, thus raising, experimentally, the lowest of beings to the highest type of humanity? And as in his study of consumption he had arrived at the conclusion that it was not hereditary, but that every child of a consumptive carried within him a degenerate soil in which consumption developed with extraordinary facility at the slightest contagion, he had come to think only of invigorating this soil impoverished by heredity; to give it the strength to resist the parasites, or rather the destructive leaven, which he had suspected to exist in the organism, long before the microbe theory. To give strength—the whole problem was there; and to give strength was also to give will, to enlarge the brain by fortifying the other organs.