THE INFLUENCE OF FATIGUE.--Histologists find that the nuclei of nerve
cells are shrunk as much as fifty per cent by extreme fatigue.
Reasonable fatigue followed by proper recuperation is not harmful, but
even necessary if the best development is to be attained; but fatigue
without proper nourishment and rest is fatal to all mental operations,
and indeed finally to the nervous system itself, leaving it permanently
in a condition of low tone, and incapable of rallying to strong effort.
For rapid and complete recuperation the cells must have not only the
best of nourishment but opportunity for rest as well.
