The days of our years are threescore years and ten.
The 90th Psalm.
And the Lord said . . . his days shall be an hundred and twenty years.
Modern gerontologists (old-age specialists) take a firm stand in favor of the second of these dictums. This week a doctor published a book undertaking to show that it is now possible for most people to live to be at least 100. Its title: You Are Younger Than You Think (Duell, Sloan & Pearce; $2.75). The author is Dr. Martin Gumpert of Manhattan, refugee from Nazi...