STUDIES UPON WHEAT GROWN UNDER CONSTANT CONDITIONS—I

Usually the water content of an organ is given as a percentage of the dry weight or of the fresh weight. In this paper per cent. dry weight is dry weight . fresh weight dry weight defined as frs wegt and per cent. moisture as fehwih esh weight r s e ght the sum of both is 100 per cent. If the increase in moisture (fresh weight minus dry weight) goes parallel with the increase in dry weight, both quotients remain the same; if the dry weight increases more rapidly than the moisture, or if water is lost, the per cent. dry weight increases, and the per cent. moisture decreases.