THE CORRELATIVE ACTIVITIES OF THE ALIMENTARY CANAL OF THE FOWL

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Abstract
Comparing, by various methods, the activity of the crop of the nor-mal fowl with that of the decerebrate bird, no appreciable difference was observed. Further study of the decerebrate bird reveals that no material differences in crop movements are noted before and after incising the skin and fascia over the crop and esophagus. A fistula through the skin and crop with balloons and catheters in situ did not appear to alter its activity. Contractions of the empty crop invariably result in restlessness of the bird. Less frequently thirst and defecation are factors which also cause restlessness. The form of the curve of contraction is always the same for the proventriculus. Records obtained by the balloon method show that the type of contraction of the gizzard is variable, depending upon the position of the balloon in the cavity of that organ. In hunger, the proventriculus and gizzard are vigorously and continuously contracting.

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