I 



ISOTOPIC TRACERS AND 

 NUCLEAR RADIATIONS 



With Applications to Biology 

 and Medicine 



by William E. Siri 



with contributions by 

 Ellsworth C. Dougherty 

 Cornelius A. Tobias Rayburn W. Dunn 

 James S. Robertson Patricia P. Weymouth 



Division of Medical Physics, Department of Physics, and 

 Radiation Laboratory, University of California 



FIRST EDITION 



McGRAW-HILL BOOK COMPANY, INC. 



NEW YORK TORONTO LONDON 1949 



