By: Ardis E. Parshall - November 24, 2011 For background and links to chapters in this series, see here LESSON XXI KEEPING FIT The foundation of ability to do good work is physical fitness. There have been not a few persons who have been so intensely interested in the necessity of finishing college and preparing for some profession, that they have been blind to everything else, even the preservation of their health. They have overwo...
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