J. M. Francis, chemical superintendent of I aike Davis & Co., Detroit, MICH.

E. C. Franklin, professor of organic chemistry and dean of graduate study, Leland Stanford Junior University, Stanford University, Calif.

W. F. Hillebrand, chief chemist, United States Bureau of Standards, Washington, D. C.

John Johnston, Sterling professor of chemistry, Yale University, New Haven, Conn. Julius Stieglitz, professor of chemistry, University of Chicago, Chicago, Ill.

J. E. Teeple, consulting chemist and chemical engineer, 50 West Forty-first Street, New York City.

AMERICAN ELECTROCHEMICAL SOCIETY.

Colin G. Fink, manager of research laboratories, Chile Exploration Co., Two hundred and second Street and Tenth Avenue, New York City.

AMERICAN INSTITUTE OF CHEMICAL ENGINEERS.

Hugh K. Moore, manager of research laboratory, Brown Co., Berlin, N. H.

AMERICAN CERAMIC SOCIETY.

Albert V. Bleininger, ceramic chemist, United States Bureau of Standards, PittsDurgh, Pa.

MEMBERS AT LARGE.

C. H. Herty, editor of the Journal of Industrial and Engineering Chemistry, 1 fadison Avenue, New York City.

G. A. Hulett, professor of physical chemistry, Princeton University, Princeton, N. J. A. B. Lamb, professor of chemistry and director of the chemical laboratory, Harvard niversity, Cambridge, Mass.

A. A. Noyes, director of chemical research, California Institute of Technology, asadena, Calif.

C. L. Parsons, consulting chemist, United States Bureau of Mines; secretary of the merican Chemical Society, 1709 G Street, Washington, D. C.

E. W. Washburn, professor of ceramic chemistry and head of the department of ramic engineering, University of Illinois, Urbana, Ill.

Burton E. Livingston, liaison member from the division of biology and agriculture; ofessor of plant physiology and director of the laboratory of plant physiology, Johns opkins University; permanent secretary of the American Association for the vancement of Science, Washington, D. C.

A representative of the division of Federal relations.

COMMITTEES.

Committee on ceramic research: Chairman, Albert V. Bleininger.

Committee on chemistry of colloids: Chairman, H. N. Holmes, professor of chemy, Oberlin College, Oberlin, Ohio.

Committee on contact catalysis: Chairman, Wilder D. Bancroft.

Committee on explosives investigations: Chairman, Charles E. Munroe, National earch Council, Washington, D. C.

ommittee on methods of organic analysis: Chairman, C. G. Derick. ommittee on pharmaceutical research: Chairman, J. M. Francis.

ommittee on sewage disposal: Chairman, Edward Bartow, professor of sanitary nistry, University of Illinois, Urbana, Ill.

ommittee on synthetic drugs: Chairman, Julius Stieglitz.

epresentative of the division on committee of the American Petroleum Institute mprovement of methods: Robert E. Wilson, director of the research laboratory of ied chemistry, Massachusetts Institute of Technology, Cambridge, Mass.

X. DIVISION OF GEOLOGY AND GEOGRAPHY.

Chairman, E. B. Mathews.

Vice chairman, N. M. Fenneman.

Secretary, H. P. Little.

EXECUTIVE COMMITTEE.

Chairman, E. B. Mathews; vice chairman, N. M. Fenneman; Isaiah Bowman, A H. Brooks, R. A. F. Penrose, jr., Walter S. Tower, David White.

MEMBERS OF THE DIVISION.

ASSOCIATION OF AMERICAN GEOGRAPHERS.

W. M. Davis, professor emeritus of geology, Harvard University, Cambridge, Mass. N. M. Fenneman, professor of geology and geography, University of Cincinnati, Cincinnati, Ohio.

Walter S. Tower, Consolidated Steel Co., 165 Broadway, New York City.

AMERICAN GEOGRAPHICAL SOCIETY.

Isaiah Bowman, director of the American Geographical Society, Broadway at One hundred and fifty-sixth Street, New York City.

GEOLOGICAL SOCIETY OF AMERICA.

John M. Clarke, State geologist and paleontologist; director of the State museum, Education Building, Albany, N. Y.

Whitman Cross, geologist, United States Geological Survey, Washington, D. C. R. A. Daly, professor of geology, Harvard University, Cambridge, Mass.

H. E. Gregory, Silliman professor of geology, Yale University; superintendent of the geological and natural history survey of Connecticut, New Haven, Conn.

A. C. Lawson, professor of mineralogy and geology, University of California, Berkeley, Calif.

C. K. Leith, professor of geology, University of Wisconsin, Madison, Wis.

PALEONTOLOGICAL SOCIETY.

T. Wayland Vaughan, chief of the section of coastal plains investigations, United States Geological Survey, Washington, D. C.

NATIONAL GEOGRAPHIC SOCIETY.

Gilbert Grosvenor, president and editor of the National Geographic Society, Washington, D. C.

REPRESENTATIVE OF THE DIVISION OF FEDERAL RELATIONS.

George Otis Smith, director of the United States Geological Survey, Washington, D. C.

MEMBERS AT LARGE.

Ralph Arnold, consulting geologist, 925 Union Oil Building, Los Angeles, Calif. Eliot Blackwelder, consulting geologist, 317 Railway Exchange Building, Denver, Colo.

A. H. Brooks, geologist in charge, division of Alaskan mineral resources, United States Geological Survey, Washington, D. C.

Arthur L. Day, director of the geophysical laboratory, Carnegie Institution of Washington, Washington, D. C.

Ellsworth Huntington, research associate in geography, Yale University, New Haven, Conn.

Douglas W. Johnson, professor of physiography, Columbia University, New York City.

E. B. Mathews, professor of mineralogy and petrography, Johns Hopkins University; State geologist of Maryland; director of the State weather service, Baltimore, Md.

R. A. F. Penrose, jr., consulting geologist, 460 Bullitt Building, Philadelphia, Pa. David White, chief geologist, United States Geological Survey, Washington, D. C.

COMMITTEES.

Committee on Becker memorial fellowship: Chairman, John Hays Hammond, Washington, D. C.

Committee on financial resources: Chairman, Ralph Arnold.

Committee on development of geographical sciences: Chairman, N. M. Fenneman. Committee on paleobotany: Chairman, David White.

Committee on sedimentation: Chairman, T. Wayland Vaughan.

Representative of the division on advisory council of the United States Board of Surveys and Maps: E. B. Mathews.

XI. DIVISION OF MEDICAL SCIENCES.

Chairman, George W. McCoy.

Vice chairman, Frederick P. Gay.

EXECUTIVE COMMITTEE.

Chairman, George W. McCoy; vice chairman, Frederick P. Gay; Henry A.Christian, Simon Flexner, W. H. Howell, Reid Hunt, V. C. Vaughan.

MEMBERS OF THE DIVISION.

George W. McCoy, director of the hygienic laboratory, United States Public Health Service, Washington, D. C.

AMERICAN ASSOCIATION OF ANATOMISTS.

Clarence M. Jackson, professor of anatomy and director of the department of anatomy, University of Minnesota, Minneapolis, Minn.

AMERICAN ASSOCIATION OF PATHOLOGISTS AND BACTERIOLOGISTS.

Howard T. Karsner, professor of pathology, Western Reserve University, Cleveland, Ohio.

AMERICAN NEUROLOGICAL ASSOCIATION.

Hugh T. Patrick, associate professor of nervous and mental diseases, medical school, Northwestern University, Chicago, Ill.

AMERICAN PHYSIOLOGICAL SOCIETY.

W. H. Howell, assistant director of the school of hygiene and public health and professor of physiology, Johns Hopkins University, Baltimore, Md.

AMERICAN MEDICAL ASSOCIATION.

R. T. Woodyatt, associate professor of medicine, Rush Medical College, Chicago, Ill.

AMERICAN ROENTGEN RAY SOCIETY.

Augustus W. Crane, 420 South Rose Street, Kalamazoo, Mich.

AMERICAN SOCIETY FOR CLINICAL INVESTIGATION.

Henry A. Christian, Hersey professor of the theory and practice of physic, Harvard University; physician in chief, Peter Bent Brigham Hospital, Boston, Mass.

AMERICAN SOCIETY FOR EXPERIMENTAL PATHOLOGY.

Peyton Rous, associate member of the department of pathology and bacteriology, Rockefeller Institute for Medical Research, Sixty-sixth Street and Avenue A, New York City.

AMERICAN SOCIETY FOR PHARMACOLOGY AND EXPERIMENTAL THERAPEUTICS.

Reid Hunt, professor of pharmacology, Harvard University, Boston, Mass.

AMERICAN SOCIETY OF BIOLOGICAL CHEMISTS.

Graham Lusk, professor of physiology, Cornell University Medical College, New York City.

AMERICAN SURGICAL ASSOCIATION.

George W. Crile, professor of surgery, Western Reserve University, Cleveland, Ohio.

AMERICAN VETERINARY MEDICAL ASSOCIATION.

ASSOCIATION OF AMERICAN PHYSICIANS.

W. S. Thayer, professor of medicine, Johns Hopkins University, Baltimore, Md.

NATIONAL DENTAL ASSOCIATION.

Thomas B. Hartzell, professor of mouth infections, medical school, University of Minnesota, Minneapolis, Minn.

MEMBERS AT LARGE.

David L. Edsall, Jackson professor of clinical medicine and dean of the medical school, Harvard University; chief of medical service, Massachusetts General Hospital, Boston, Mass.

Joseph Erlanger, professor of physiology, school of medicine, Washington University, St. Louis, Mo.

Simon Flexner, director of research laboratories, Rockefeller Institute for Medical Research, Sixty-sixth Street and Avenue A, New York City.

Frederick P. Gay, professor of pathology, University of California, Berkeley, Calif. G. Carl Huber, professor of anatomy and director of the anatomic laboratories, University of Michigan, Ann Arbor, Mich.

Allan J. McLaughlin, Assistant Surgeon General, United States Public Health Service, Washington, D. C.

R. M. Pearce, Rockefeller Foundation, 61 Broadway, New York City.

Rear Admiral Edward R. Stitt, Surgeon General and chief of the Bureau of Medicine and Surgery, United States Navy, Washington, D. C.

V. C. Vaughan, professor of hygiene and physiological chemistry and dean of the medical school, University of Michigan, Ann Arbor, Mich.

William H. Welch, director of the school of hygiene and public health, Johns Hopkins University, Baltimore, Md.

H. Gideon Wells, professor of pathology, University of Chicago; director of the Otho S. A. Sprague Memorial Institute, Chicago, Ill.

A representative of the division of Federal relations.

COMMITTEES.

Committee on anatomy: Chairman, Clarence M. Jackson.

Committee on dental investigations: Chairman, Thomas B. Hartzell.

Committee on neurology and psychiatry: Chairman, Hugh T. Patrick.

Committee to formulate plans for the production of pure proteins and related materials for research purposes: Chairman, H. Gideon Wells.

Committee on X ray: Chairman, Augustus W. Crane.

XII. DIVISION OF BIOLOGY AND AGRICULTURE.

Chairman, C. E. McClung.

Vice chairman, L. R. Jones.

Chairman, C. E. McClung; vice chairman, L. R. Jones; I. W. Bailey, J. R. Murlin, P. J. Parrott, Walter T. Swingle, A. F. Woods.

MEMBERS OF THE DIVISION.

AMERICAN SOCIETY OF AGRONOMY.

Charles V. Piper, agrostologist in charge, forage crop investigations, United States Bureau of Plant Industry, Washington, D. C.

SOCIETY OF AMERICAN BACTERIOLOGISTS.

Samuel C. Prescott, professor of industrial biology, Massachusetts Institute of Technology, Cambridge, Mass.

BOTANICAL SOCIETY OF AMERICA.

H. H. Bartlett, associate professor of botany, and director of gardens and arboretum, University of Michigan, Ann Arbor, Mich.

William Crocker, associate professor of plant physiology, University of Chicago, Chicago, Ill.

L. R. Jones, professor of plant pathology, University of Wisconsin, Madison, Wis.

AMERICAN ASSOCIATION OF ECONOMIC ENTOMOLOGISTS.

P. J. Parrott, entomologist, New York Agricultural Experiment Station, Geneva, N. Y.

ECOLOGICAL SOCIETY OF AMERICA.

Ellsworth Huntington, research associate in geography, Yale University, New Haven, Conn.

SOCIETY OF AMERICAN FORESTERS.

Barrington Moore, president of the Ecological Society of America, 925 Park Avenue, New York City.

AMERICAN GENETIC ASSOCIATION.

G. N. Collins, botanist, United States Bureau of Plant Industry, Washington, D. C.

AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE.

U. P. Hedrick, horticulturist, New York Agricultural Experiment Station, Geneva, . Y.

AMERICAN PHYTOPATHOLOGICAL SOCIETY.

George R. Lyman, pathologist in charge, plant disease survey, United States ureau of Plant Industry, Washington, D. C.

AMERICAN SOCIETY OF ZOOLOGISTS.

M. F. Guyer, professor of zoology, University of Wisconsin, Madison, Wis.
F. R. Lillie, professor of embryology, University of Chicago, Chicago, Ill.
G. H. Parker, professor of zoology, Harvard University, Cambridge, Mass.

REPRESENTATIVE OF THE DIVISION OF FEDERAL RELATIONS.

Karl F. Kellerman, physiologist and associate chief, United States Bureau of ant Industry, Washington, D. C.

MEMBERS AT LARGE.

. W. Bailey, associate professor of forestry, Bussey Institution, Harvard University, rest Hills, Mass.

Burton E. Livingston, professor of plant physiology, and director, laboratory of nt physiology, Johns Hopkins University; permanent secretary of the American ociation for the Advancement of Science, Washington, D. C.