A THE 



HUMAN MOTOR 



OR 



THE SCIENTIFIC FOUNDATIONS OF LABOUR 

 AND INDUSTRY 



BY 

 JULES AMAR, D.Sc., 



Director of the Research Laboratory of Industrial Labour 

 at the Conservatoire National des Arts et Metiers, Paris 



WITH 309 ILLUSTRATIONS AND NUMEROUS TABLES 



LONDON : 



GEORGE ROUTLEDGE & SONS, LTD. 

 NEW YORK: E. P. DUTTON & CO., 

 1920 



