Longevity
The changes, exposures, and deprivations attending on the life of the roving tribes are without doubt great causes of the slow increase of Indian population. We think from actual observation that not more than two out of five children live until youth is passed. Even a few days after their birth, and sometimes but a few hours after, they are packed on the backs of their mothers in all weather, exposed to cold, snow, and wet. They must be iron to stand this. Should they be so fortunate as to reach the age of 4 to 6 years they follow the camp on foot through spring thaws, exposed to rain and cold, for weeks together, and a great many thus die from cold, pleurisy, and rheumatism. No question but the uncertainty of their food also contributes to their mortality, not that they often absolutely starve to death, but are rendered weak and unable to stand the hardship the life requires. In maturity war takes off another portion of the remainder, and diseases contracted by the exposures of their youth, together with their continued exertions as required by their precarious life, places it beyond probability of many arriving at extreme age. It is evident that the hard labor the women perform after marriage ruins their constitutions. A woman is old on the plains at the age of 35 years, and seldom healthy. They have from 2 to 5 children, more are occasionally seen, but 7 or 8 is a rare occurrence. There are but few very old women. The usual diseases by which they are carried off are pains in the head, heart, and side, consumption, hemorrhages from the nose and other ducts, puerperal fever, peritoneal inflammations, deliveries, and rheumatism.
Some of these complaints are certainly produced by their continued stooping when in the act of scraping skins, others from exposure, and all aggravated by their injudicious medical treatment.
A woman ceases to bear at 40 years, often earlier. Children have been produced by women at the age of 15, though this is uncommon; from 18 to 35 is the usual period. Twins are often seen; that is as frequently as this happens among the same number of white women. It is remarkable that women who bear twins are liable to a repetition of twin bearing, and two or three pairs follow. Two instances have happened under our observation where women had three children at a delivery. Barrenness is met with, but is by no means common.