Vaccine. 1, Standardization of antityphoid vaccine, by George W. McCoy; 2, Colorimetric method for estimation of cresol or phenol preservative in serums, by Elias Elvove; 3. Toxicity of certain preservatives used in serums, viruses, and vaccines, by James P. Leake and Hugh B. Corbitt; 4, Observations on significance of antisheep amboceptor in human serum, with reference to complement fixation test for syphilis, by Mather H. Neill.

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