And thus we approach one of the problems which this book is designed to solve.

There are eight million men in this country between the ages of forty-five and sixty-four.

Probably we may count upon another million from the men of sixty-four to seventy who would be "prospects," as the mining-men say.

These men represent nine-tenths of the financial and executive strength of the United States.
THE SENIOR SERVICE CORPS When I started the experiment of the Senior Service Corps at New Haven, in the spring of 1917, all my men were over forty-five, and several of them had passed the seventy mark; yet all found increased health and efficiency from the prescribed regime.

There was a distinct gain, not only in health, but in spirits and in temper.