form being, "In all living forms the basis of all energy is sex-energy." Looking about for facts to confirm or disprove this assertion all investigators have been faced with similar phenomena, such as: When the male fowl is sterilized in order that he may grow big and fat for the market later he loses his cock's plumage and gains in weight. In the psychic domain the changes are still more marked. The capon is a coward, shunning the contest for supremacy. He does not forage for the hens, inviting them to feed upon what he has found, but looks after himself first and last. He is lazy, sluggish, and selfish. The stallion is a proud and beautiful animal, and Job's description of the war-horse "He paweth in the valley and rejoiceth in his strength, He goeth on to meet the armed men!" with its context, is still the best word-painting we have of the majesty of the horse in full possession of his sexual powers. The gelding is tractable and useful, and the absence of the fiery impatience of the stallion fits the gelding for man's use. When men are castrated, as in the East, in youth, where they are prized as custodians of the harem, they are fat, usually large of frame, but short-lived. The growth of hair on the head is often scant; on the face and body it is altogether missing. The voice is high, partaking of a treble quality. When through surgical operation or accident it happens that a man is deprived of the testicular glands in youth, early manhood, or even middle-age, the same changes follow as in the case of the eunuch, the hair on face and body disappears, the voice changes from deep to high tone, and mentally the man develops inertia and cowardice. Physically, he puts on fat almost immediately. When women have, for any reason, had their ovaries removed by surgical operation, marked changes follow, which vary much in detail, but carry certain general similarities. The face and body age rapidly in appearance, and there is a slowing up of functions of the organs, with a tendency to masculinity in tastes, behavior, feelings.