Abstract
Summary
An attempt was made to cause acceleration of feather growth in fowl by injections of growth hormone in the vicinity of regenerates. The preparation used gave a 20-gram body weight increase in 15 days in the hypophysectomized rat in dosage of 50 gamma per 50 grams body weight. Six Brown Leghorn males each received 40, 160, and 320 gamma over a period of weeks. One fowl was given 10 mg daily for 5 days. All tests were negative in feather growth but induced pattern changes indicated the presence of traces of thyrotrophin in the preparation.
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