MONOGRAPHS ON EXPERIMENTAL BIOLOGY 



EDITED BY 



JACQUES LOEB, Rockefeller Institute 



T. H. MORGAN, Columbia University 



W. J. V. OSTERHOUT, Harvard University 



VOLUME I 



FORCED MOVEMENTS, TROPISMS, 

 AND ANIMAL CONDUCT 



BY 

 JACQUES LOEB, M.D.,' PH.D., Sc.D. 



