Harold L. Higgins, A.B., M.D. 



ASSISTANT PKOFESSOB OF PEDIATRICS, UNIVERSITY OF CINCINNATI; ATTENDING PEDIATRI- 

 CIAN OF THE CINCINNATI GENERAL HOSPITAL. 



Wilder Tileston, A.B., M.D. 



CLINICAL PROFESSOR OF MEDICINE, YALE UNIVERSITY; ATTENDING PHYSICIAN, NEW HAVEN 



HOSPITAL. 



Donald Van Slyke, A.B., Ph.D. 



PRESENT MEMBER OF THE ROCKEFELLER INSTITUTE FOR MEDICAL RESEARCH AND CHEMIST 

 AT THE HOSPITAL OF THE ROCKEFELLER INSTITUTE. 



Eugene F. Du Bois, M.D. 



MEDICAL DIRECTOR, RUSSELL SAGE INSTITUTE OF PATHOLOGY; DIRECTOR SECOND MEDICAL 

 DIVISION OF BELLEVUE HOSPITAL; ASSOCIATE PROFESSOR OF MEDICINE, CORNELL UNIVERSITY 



MEDICAL COLLEGE. 



Franklin C. McLean, S.B., M.S., M.D., Ph.D. 



UNIVERSITY OF CHICAGO. ASSISTANT (MEDICINE), ASSISTANT RESIDENT PHYSICIAN, 

 ROCKEFELLER INSTITUTE HOSPITAL, OCTOBER, 1914 JULY, 1916; PROFESSOR OF MEDICINE, 

 PEKING UNION MEDICAL COLLEGE, JULY, 1916; VOLUNTEER WORKER, ROCKEFELLER INSTI- 

 TUTE HOSPITAL, 1920; PROFESSOR OF MEDICINE, PEKING UNION MEDICAL COLLEGE, 



DECEMBER, 1920. 



Warneld T. Longcope, A.B., M.D. 

 George M. Mackenzie, A.B., M.D. 



ASSOCIATE IN MEDICINE, COLLEGE OF PHYSICIANS AND SURGEONS, COLUMBIA UNIVERSITY; 

 ASSOCIATE VISITING PHYSICIAN PRESBYTERIAN HOSPITAL. 



Elmer Verner McCollum, Ph.D., Sc.D. 



PROFESSOR OF BIOCHEMISTRY; A.B., UNIVERSITY OF KANSAS, 1903, AND A.M., 1904; 

 LOOMIS FELLOW, YALE UNIVERSITY, 1905-1906, AND PH.D., 1906; SC.D., UNIVERSITY OF CIN- 

 CINNATI, 1920; INSTRUCTOR, ASSISTANT PROFESSOR, ASSOCIATE PROFESSOR AND PROFESSOR 

 OF AGRICULTURAL CHEMISTRY, UNIVERSITY OF WISCONSIN, 1907-1917; CUTTER LECTURER 

 ON HYGIENE AND PREVENTIVE MEDICINE, HARVARD UNIVERSITY, 1917-1918; MEMBER OF 

 THE NATIONAL ACADEMY OF SCIENCES; ASSOCIATE MEMBER ROYAL ACADEMY OF MEDICIXE 

 OF BELGIUM; ASSOCIATE EDITOR, JOURNAL OF BIOLOGICAL CHEMISTRY AND JOURNAL OF 

 DENTAL RESEARCH; SINCE 1917 PROFESSOR OF BIOCHEMISTRY, SCHOOL OF HYGIENE AND 

 PUBLIC HEALTH, JOHNS HOPKINS UNIVERSITY. 



ill 



