The purpose of this investigation was the determination of the variation of uric acid, creatinine and non-protein in the blood of chickens during the molting season. It was noted by Thompson and Carr 2 that polyneuritis developed in chickens in a much shorter period if they were molting. They also found that with the onset of polyneuritis there was a marked increase in the uric acid and creatinine content of the blood. These facts seemed to indicate a disturbance of the endogenous metabolism. Therefore it was thought since molting hastened polyneuritis it too was closely related to endogenous metabolism, and consequently the amount of non-protein, creatinine and uric acid should increase during the molting period when the birds are losing their feathers. Further, Blish and Ackerson 3 (1923) have observed that during the molting period the amount of nitrogen excreted is increased, which gives more evidence that molting produces a disturbance of . . .
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Thompson et al. (1925) studied this question.