THE JOURNAL 



OF 



GENERAL PHYSIOLOGY 



EDITORS 

 JACQUES LOEB W. J. V. OSTERHOUT 



VOLUME III, NO. 4 MARCH 20, 1921 



PUBLISHED BIMONTHLY 

 at mount royal and guilford avenues, baltimore, md. 

 By The Rockefeller institute for Medical Research 



COPYEIGHT, 1921, BY THE ROCKEFELLER INSTITUTE FOB MEDICAL RESEARCH 

 Entered as second-daw matter November 25, 1918, at the Post Office at Baltimore, Md., under the Act of March 3, 1879. 



