TREASURY DEPARTMENT. 
Public Health and Marine-Hospital Service of the United States. 
HYGIENIC LABORATORY.— BULLETIN No. 43. 
March, 1908. 
THE STANDARDIZATION OF 
TETANUS ANTITOXIN 
(A\ AMERICAN UNIT ESTABLISHED UNDER 
AUTHORITY OF THE ACT OF JULY 1, 1902) 
BY 
NX. j. 
and 
JOXDX K. AyXDERSOX. 
; 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1908. 
