QUARTERLY 

 JOURNAL OF 

 EXPERIMENTAL 

 PHYSIOLOGY 



EDITORS 

 E. A. SCHAFER, EDINBURGH 

 W. D. HALLIBURTON, LONDON 

 C. S. SHERRINGTON, OXFORD 

 E. H. STARLING, LONDON 

 A. D. WALLER, LONDON 



VOLUME XL 



LONDON: CHARLES GRIFFIN AND COMPANY, LIMITED 

 EXETER STREET, STRAND 



1917 



