CHAPTER II.
THE ONE MEAL PLAN.
The progress of culture often resembles the undulating rise of the tide, rather than the steady advance of a river current; the rippling waves surge in capricious eddies and for a time may even seem to recede. Scientific tenets familiar to the philosophers of pagan antiquity were lost sight of during the night of the Middle Ages, and in the dawn of modern civilization are apt to be viewed with doubt or accepted as novel discoveries.
The true theory of the solar system, for instance, was known to the disciples of Pythagoras; but a thousand years later was forgotten almost as completely as the existence of the lost Atlantis. Centuries before the birth of Ludwig Jahn the Greeks had recognized the truth that in thickly settled countries the lack of wood-sports ought to be compensated by gymnastic training and competitive athletics. There were fresh-air doctors two thousand years before Dio Lewis, and during the zenith period of Grecian and Roman civiliza-
