STUDIES ON THE TRANSPIRING POWER OF PLANTS AS INDICATED BY THE METHOD OF STANDARDIZED HYGROMETRIC PAPER.

The article discusses studies which investigated the transpiring power of plants as indicated by the method of standardized hygrometric paper. It explains the idea of a standard evaporating surface, the power of which to give off water to the hygrometric cobalt chloride paper was compared directly with the similar power possessed by the leaf surface in question. The use of saturated blotting paper as standard evaporating surface to avoid some of the difficulties arising from the use of the free water surface is also described.