Behavior Monographs 



Volume 2. Number 5. 1915 Serial Number 10 



Edited by JOHN B. WATSON 



The Johns Hopkins Univeraity 



Distribution of Effort in Learning 

 in the White Rat 



JOHN LINCK ULRICH 



Published 



at Cambridge, Boston, Mass. 



HENRY HOLT & COMPANY 



34 West 33d Street, New York 



G. E. STECHERT & CO.. London. Paris and Leipzig, Foreign Agenti 



