Bills, Marion A. Dr. Bills has engaged in

various fields of advertising and personnel research for ten years, the last four as Associate Director of the Bureau of Personnel Research. Recently she was made consultant in research on sales and office personnel to the Life Insurance Sales Research Bureau, New York City. She is also carrying on private consultation work with business and industrial concerns. Has specialized in selection, employment and organization methods of large offices and is a regular contributor to the Journal of Applied Psychology, The Journal of Personnel Research and other magazines on personnel problems.

Bingham, W. V., Director of the Division of Coöperative Research in Carnegie Institute of Technology. After teaching in Columbia and Dartmouth Dr. Bingham went to Pittsburgh, 1915, as Professor of Psychology. Immediately began to gather about him a group of investigators in business psychology whose work has gone far to demonstrate the importance of scientific method for studying human relations in business and the feasibility of coöperative organization for research within this field. He was one of the psychologists who, in 1917, first formulated the army methods of psychological examination. He served as Executive Secretary of the Committee on Classification of Personnel in the Army and as lieutenant-colonel in the Personnel Branch of the General Staff. He is a founder and director of the Personnel Research Federation and a contributor to its Journal of Personnel Research.

Cameron, E. H., Professor of Educational Psychology at the University of Illinois. Dr. Cameron was formerly Assistant Professor of Psychology, Yale University, and has served as public school administrator in several different capacities. Has engaged in research in theoretical and applied psychology. Author, Psychology and the School.

Cattell, J. McKeen, Appointed Professor of Psychology in the University of Pennsylvania in 1888. This was the first chair of psychology in any university. Later, for twenty-six years, Professor of Psychology in Columbia University. Part of that time head of the departments of philosophy and of anthropology. President of the Psychological Corporation since its organization.

Dr. Cattell published the first measurements of individual differences, a work making the

direction in which psychology is now most active. Forty-six of his former students who received the degree of Doctor of Philosophy at Columbia have become members of the American Psychological Association. Dr. Cattell established The Psychological Review in 1894. He has been editor of Science since 1895, of The Scientific Monthly since 1900, of The American Naturalist since 1908, and of School and Society since 1915.

Chapman, J. Crosby, Associate Professor of Educational Psychology, Yale University. D.Sc. University of London. Ph.D., Columbia. Assistant and Associate Professor of Experimental Education, Western Reserve, 1914-20; member National Research Council sub-committee on Selection of Men with Special Skill, 1917-18; member of Committee on Classification of Personnel, Army Trade Test Division, 1917-19; consultant to the U. S. Department of Labor, Trade Interview Method Section, 1919-20; consulting expert to War Department, Tests and Standards Section, 1920.

Crennan, C. H., Fconomist, Continental and Commercial National Bank, Chicago. Incidentally, Dr. Crennan has directed research for the determination of personnel policies and machinery in that institution. Formerly member of faculty, Wharton School of Finance and Commerce, University of Pennsylvania, as well as Director, Research Bureau, Pennsylvania State Chamber of Commerce, and Assistant Editor of The Annals of the American Academy of Political and Social Science. Editor-in-charge of a number of volumes of The Annals.

Dunlap, Knight, Professor of Experimental Psychology in the Johns Hopkins University. During war major Sanitary Corps, in charge of psychologic section of Medical Research Laboratory, Air Service.

Dr. Dunlap has been a pioneer in many lines of psychology, doing experimental work in both pure and applied psychology. In the latter field, his work has been principally in problems connected with aviation, illumination, tobacco effects and the selection of personnel. Inventor of numerous pieces of scientific apparatus and originator of several tests for specific mental functions.

Author, A System of Psychology; An Outline of Psychobiology; Personal Beauty and Racial Betterment; Mysticism, Freudianism and Scien