List of Contributors 



H. A. BARKER 



Department of Plant Biochemistry 

 University of California, Berkeley. 



BERNARD D. DAVIS 



United States Public Health Service, Tuberculosis Research 

 Laboratory, Cornell University Medical College, New York. 

 (Present address: Department of Pharmacology, New York 

 University College of Medicine, New York 16.) 



HARRY EAGLE 



Section of Experimental Therapeutics, Laboratory of Infectious 

 Diseases, National Microbiological Institute, National Institute 

 of Health, United States Public Health Service, Bethesda, 

 Maryland. 



JACKSON W. FOSTER 



Department of Bacteriology, 

 University of Texas, Austin. 



MICHAEL HEIDELBERGER 



Columbia University College of Physicians and Surgeons, 

 New York. 



FRANK L HORSFALL. JR. 



The Hospital of the RockcffdleT Insfilute for Medical Research, 

 New York. 



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