Abstract
IN the the nature investigation of the chemical now being processes carried leading on at to the the Imperial break-down College of the of t e nature of the chemical pr esses lea ing o the br k-dow f the apple during storage (4, 5), a rapid method of finding the dry weight of a large number of samples was required. The dry material of tissue of this kind consists of 80-90 per cent, water-soluble substances, chiefly sugars and acids, and 10-20 per cent, cellulose, pectin, and other insoluble substances. Dryweight data should afford a simple means of comparing the amounts of material present in different samples and of tracing losses due to respiration. Also by determining the amount of cell-wall material as well as total dry weight, some measure of changes in the concentration of the sap of the apple can be made.
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