STUDIES IN IMMUNITY 



BY 



PROFESSOR PAUL/^EHRLICH 



PRIVY COUNCILOR AND DIRECTOR OP THE ROYAL INSTITUTE FOR EXPERIMENTAL THERAPY, 



FRANKFURT, GERMANY 



AND HIS COLLABORATORS 



COLLECTED AXD TRANSLATED 



BY 



DR. CHARLES BOLDUAN 



BACTERIOLOGIST. RESEARCH LABORATORY, DEPARTMENT OF HEALTH, CITY OP NEW YORK 



SECOND EDITION, REVISED AND ENLARGED 



?l 



NEW YORK 



JOHN WILEY & SONS 



LONDON: CHAPMAN & HALL, LIMITED 



1910 



