The age of mental virility : an inquiry into the records of achievement of the world's chief workers and thinkers / by W. A. Newman Dorland.

  • W. A. Newman Dorland
Date:
1908
Catalogue details

Licence: Public Domain Mark

Credit: The age of mental virility : an inquiry into the records of achievement of the world's chief workers and thinkers / by W. A. Newman Dorland. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    have their place in the evolution of the race, and both bring material contribu- tions to the world's accumulation of accomplishment. In an investigation like that now on hand three questions arise at the outset, and these comprise the entire scope of the period of mental activity: At what age did a given individual begin to show evidences of mental activity along lines of original research? when did he ac- complish the greatest work of his life? and how long did his mind continue to functionate and produce in the chosen sphere of activity? Advancing from the individual to the various groups in the special lines of work, we next must as- certain the average ages for these groups and the total average age for al] the indi- viduals studied at these three periods of their lives.