wittwer's

Updated: May 21, 2025

The proportion of the water of precipitation taken up by direct evaporation from the surface of the ground seems to have been generally exaggerated, sufficient allowance not being made for moisture carried downwards or in a lateral direction by infiltration or by crevices in the superior rocky or earthy strata. It does not appear whether this inference is Mariotte's or Wittwer's.

George P. Marsh - The Earth as Modified by Human Action