Excerpt from The Journal of Infectious Diseases, 1918, Vol. 22 In a previous communication,1 we presented the results of some experimental observations bearing on the relationship between the glo bulin content of an animal's serum and the grade of immunity devel oped in it by immunization with various bacteria. These observations brought out several interesting points concerning the relation of the serum globulins to the antibodies, and especially emphasized the lack Of parallelism between the globulin content of the blood and the con centration of antibodies. During the past year, we have directed our efforts to a consideration of this problem in its bearing on antitoxic immunity. This subject possesses more than academic interest because of the constant association of the antisubstance with the serum glo bulin, and because of the practical application that has been made of this knowledge in the preparation and concentration of antitoxic serums. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.