Abstract
Glycogenolysis was inhibited to an avg. extent of 41% by cortical hormone in a conc. of 6 rat units per 5 cc. The results in [male] rats seem to be influenced by hormonal tides of the sexual cycle. The effect of cortical hormone was greater than that of insulin and was not increased by combining the two. The results support the conclusion that inhibition of the hepatic glycogenolytic enzymes is an essential function of cortical hormone.