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 spend an equal time over the construction of a new machine more absolutely automatic than any that has preceded it. Physical labour is thrown as much as possible on the young; and even they are now so helped by machinery and by trained animals, that the eight hours' work which forms their day's labour hardly tires their muscles. Our tastes render us very anxious to devolve upon others as soon as possible the preservation and development of the property we have acquired. A man of moderate means, long before he has reached his thirtieth year, generally seeks one assistant; men of larger fortune may want two, five, or ten. These are chosen, as a rule, by preference from those who have passed the most stringent and successful collegiate examination. Martial parents are not prolific, and the mortality in our public nurseries is very large. I impute it to moral influences, since the chief cause of death is low vitality, marked nervous depression and want of animal spirits, such as the total absence of personal tenderness and sympathy must produce in children. It is popularly ascribed to the over-cultivation of the race, as plants and animals highly civilised—that is, greatly modified and bred to an artificial excellence by human agency—are certainly delicate, unprolific, and especially difficult to rear. There is little disease in the nurseries, but there is little health and a deficiency of nervous energy. One fact is significant, however interpreted, and bears directly on your last question. Since the wide extension of polygamy, female births are to male about as seven to six;