The Journal of Comparative 



Neurology and Psychology 



Founded by C. L. Herrick 



EDITORS 



C. JUDSON HERRICK, Manager, 

 Denison University 



ROBERT M. YERKES, 



Harvard University 



OLIVER S. STRONG, 



Columbia University 



ASSOCIATED WITH 



HERBERT 8. JENNINGS, 



University of Pennsylvania 



COLLABORATORS 



J. >rARK BALDWIN. Johns Hopkins University 

 FRANK W. BAKCROFT, University of California 

 LEWELLYS F, BARKER, University of Cliicago 

 H. HEATH BAWDEN. Vas?ar College 

 iLBRECHT BETHE, University of Strassburg 

 G. E. COGHILI^. Pacific University 

 FRANK J. COLE, University of Liverpool 

 H. E. CRAMPTOX, Columbia University 

 C. B. DAVENPORT, University of Chicago 

 \VM. HARPER DAVIS, Lehigh University 

 HENRY H. DONALDSON, University of Chicago 

 LUDWIG EDINGER, Frankfurt a-M. 

 S I. FRANZ, McLean Hospita', Waverley, Mass. 

 THOMAS H. HAINES, Ohio State University 

 A. VAN (JEHUCHTEN, University of Louva'in 

 R. G. HARRISON, Johns Hopkins University 

 C. F. HODGE, Clark University 

 S. J. HOLMES, University of Michigan 

 EDWIN B. HOLT, Harvard University 

 G. CARL HUBER, University of Michigan 

 JOSEPH JASTROW, University of Wisconsin 

 J. B. JOHNSTON, West Virgi a University 



B. F. KINGSBURY, Cornell University 

 FREDERIC S. LEE, Columbia University 

 JACQUES LOEB, University of California 

 E. P. LYON, St. Ivouis University 



ADOLF MEYER, N. Y. State Paibological Inst. 

 THOS. H. MONTGO.MERV, Jr., Univ. of Texas 

 WESLEY MILLS, McGill University 



C. LLOYD MORGAN. University College, Bristol 

 T. H. MORGAN, Columbia University 



A. D. MORRILL, Hamilton College 

 HUGO MUENSTERBERG, Harvard University 

 W. A. NAGEL, University of Berlin 

 G H PARKER. Harvard" University 

 STEWART PATON, .Johns Hopkins University 

 RAYMOND PEARL, University of Michigan 

 C. W. PRENTISS, Western Reserve University 

 C. S SHERRINGTON, University of Liverpool 

 G. ELLIOT SMITH. Gov't. Medical School. Cairo 

 EDWARD L. THORNDIKE, Columbia University 

 JOHN B. W.ATSON, Universit\ of Chicago 

 W. M. WHEELER, Am. Museum of Nat. History 

 C. O. WHITMAN, University of Chicago 



VOLUME XV 



DENISON UNIVERSITY, GRANVILLE, OHIO 

 19OS 



