

HYDROGEN ION 

 CONCENTRATION 



IT& SIGNIFICANCE 



IN THE BIOLOGICAL SCIENCES 



AND METHODS FOR ITS 



DETERMINA TIONS 



BY 

 LEONOR MICHAELIS, M.D. 



Professor in the University of Berlin, 

 Resident Lecturer in Research Medicine 

 in the Johns Hopkins University 



VOLUME I 

 PRINCIPLES OF THE THEORY 



AUTHORIZED TRANSLATION FROM THE SECOND 

 REVISED AND ENLARGED GERMAN EDITION 



BY 

 WILLIAM A. PERLZWEIG, M.A., PH.D. 



Associate in Medicine and Chemist to the 

 Medical Clinic in the Johns Hopkins 

 University and Hospital 



BALTIMORE 



THE WILLIAMS & WILKINS COMPANY 

 1926 



