Studies on Lymphocytes. I. Lymphopenia Produced by Prolonged Extracorporeal Irradiation of Circulating Blood

Abstract
1. A method for extracorporeal irradiation of the circulating blood has been developed. 2. Extracorporeal irradiation of the blood will produce a lymphopenia promptly which persists for weeks. 3. Heparin in high doses in the calf produces a lymphocytosis and neutrophilic leukocytosis.