TREASURY DEPARTMENT. 
Public Health and Marine-Hospital Service of the United States. 
Walter Wyman, Surgeon-General. 
HYGIENIC LABORATORY.— BULLETIN No. 30. 
Tvl. J. ROSENAU, Director. 
August, 1906. 
I.— MATERNAL TRANSMISSION OF IMMUNITY TO DIPHTHE- 
RIA TOXINE. 
II.— MATERNAL TRANSMISSION OF IMMUNITY TO DIPHTHE- 
RIA TOXINE AND HYPERSUSCEPTIBILITY TO HORSE 
SERUM IN THE SAME ANIMAL. 
BY 
JOHN K. ANDERSON. 
WASHINGTON: 
GOVERNA1ENT PRINTING OFFICE. 
I 906 . 
