. Botanical gazette. Plants. iqiq] CURRENT LITERATURE 179 growing organs is of importance in determining the character and amount of their respiration. The author's conclusions are as follows: "In young organs, principally leaves, intramolecular combustions are more complete than in older organs; young tissues consume much more oxygen than those completely developed, fix relatively less, and thus set at liberty greater quantities of energy, which they use in ;—G. T. Harrington. Catalase, respiration, and vitamines.—Dutcher'* finds that the catalase activity of polyneuritic pig


. Botanical gazette. Plants. iqiq] CURRENT LITERATURE 179 growing organs is of importance in determining the character and amount of their respiration. The author's conclusions are as follows: "In young organs, principally leaves, intramolecular combustions are more complete than in older organs; young tissues consume much more oxygen than those completely developed, fix relatively less, and thus set at liberty greater quantities of energy, which they use in ;—G. T. Harrington. Catalase, respiration, and vitamines.—Dutcher'* finds that the catalase activity of polyneuritic pigeons is ver>' low, and that it rises to normal W'hen the fowl is fed water soluble vitamine. His results are given in the following table: Catalase activity of tissues Tissue _ Polyneuritic pigeons, percent- age of normal < Polyneuritic pigeons receiving water soluble I vitamine, per- centage of normal Liver Pancreas. .. Heart Breast Lung Blood A\erage. no 102 "5 86 152 84 56 lOI The author says: "It is probable that polyneuritis is accompanied by in- complete or partial oxidation, with accumulation in the tissues of products of incomplete oxidation. It is also probable that water soluble vitamines func- tion, directly or indirectly, in stimulation of oxidation processes, thereby clear- ing the tissues of toxic materials. When pigeon tissues are arranged in the order of their catalase content (as measured by the oxygen liberated from hydrogen peroxide), tissues group themselves in the order of their metabolic activity and also in the order of their content of water soluble ; Appleman'7, in a recently published article, says: "Respiration in sweet corn in the milk stage is very high when the corn is first puUed. This high rate of respiratory activity falls off rapidly with storage. Catalase activity in a collateral set of ears showed a decline with storage, which is almost directly proportional to the decline in respiratory inten


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