Survival to a ripe old age

Usage examples of longevity.

This coefficient of resemblance between husband and wife in regard to phthisis is about the same as the correlation of resemblance between husband and wife for eye color, stature, longevity, general health, truthfulness, tone of voice, and many other characters.

But if young people, before picking out their life partners, are thoroughly imbued with the idea that such qualities as energy, longevity, a sound constitution, public and private worth, are primarily due to heredity, and if they are taught to realize the fact that one marries not an individual but a family, the eugenist believes that better matings will be made, sometimes realized, sometimes insensibly.

Whether it be eye color, hair color, general health, intelligence, longevity, insanity, or congenital deafness, exact measurements show that a man and his wife, though not related by blood, actually resemble each other as much as do uncle and niece, or first cousins.

Marriage of representatives of two long-lived strains ensures that the offspring will inherit more longevity than does the ordinary man.

Graham Bell has lately been emphasizing the importance of longevity in this connection, and in our judgment he has thereby opened up a very fruitful field for education.

By following down the vertical lines, one can see that their longevity depends largely on the size of family from which they come.

In this connection, longevity is of course a mark of vitality and physical fitness.

There is also some evidence that, altogether apart from the infant mortality, the children of young mothers attain a greater longevity than do those of older women.

This devotes itself solely to the collection of data regarding longevity, and sends out schedules to all those in whose families there have been individuals attaining the age of 80 or over.

Since it is known that heredity is a large factor in longevity, such a finding would mean that all deaths were due to some accident which made the inheritance of no account.

Evidently it means that although these people had inherited a high degree of longevity, their deaths were brought about by causes which prevented the heredity from getting full expression.

This necessitated a frugal and industrious life which in many ways was doubtless favorable to longevity but which may often have led to overexposure, overwork, lack of proper medical treatment, or other causes of a non-selective death.

It was found that even those who inherited exceptional longevity usually did not live as long as their inheritance gave them the right to expect.

The correlation between fecundity and longevity which Karl Pearson has demonstrated gives longevity another great advantage as a standard in sexual selection.

The same old processes of automatic selection between rival molecules by reason of their longevity, fecundity, and copying-fidelity, still go on as blindly and as inevitably as they did in the far-off days.