AUTHORS 
J. Chatonnet 
Dr. J. Chatonnet received the Doctorate of Medicine and the 
License of Sciences from the University of Lyon in 1943-44. In 1952 
he received the academic degree, Agregation. He is now "Professeur 
sans chaire" or Associate Professor of Physiology at "Faculte' 
Meciecine de I'Universite de Lyon". Whereas his earlier fields of 
research concerned the autonomic nervous system, his interest is 
now focused on the respective role of shivering and non- shivering 
thermogenesis and the central control of body temperature. 
George Clark 
Dr. George Clark received his Ph. D. from Northwestern 
University in 1939. At that time, and again in recent years, his 
research work has been devoted almost exclusively to the field of 
temperature regulation and various aspects of the neural control of 
body temperature. He is now research anatomist at the US Army 
Medical Research Laboratory, Fort Knox, Kentucky. 
Walter J. Freeman 
Dr. Walter J. Freeman obtained his M. D. at Yale, 1954; sub- 
sequently he has pursued post-graduate work at Yale in pathology, 
at Johns Hopkins in internal medicine, and at UCLA in neuro- 
physiology. His major research work has been on the anatomy, 
histopathology, and physiology of the brain. Presently he is a Fellow, 
U. S. P. H. S., and Foundation Fund for Research in Psychiatry. 
Allan Hemingway 
Dr. Allan Hemingway received his Ph. D. in 1929 from the 
University of Minnesota. His research has been in the physiology of 
body temperature regulation of man and warm-blooded animals and 
in respiration. His early work consisted of standardizing electro- 
therapeutic treatments such as heat treatments with diathermy. He 
is now studying the nervous control of shivering, the problem of 
blood flow through the lungs, and the duration of the effect of move- 
ments in respiration on blood flow through the lungs. Dr. Hemingway 
and a colleague in pharmacology, Dr. P. K. Smith of George Wash- 
ington University, discovered that the drug hyoscine prevents motion 
sickness. Dr. Hemingway is now professor of physiology at the 
UCLA Medical School. ;„ 
