74 



Bulletin No. 207. 



CHART E. 



Potency Test of Botulism Antitoxin (Cow Serum A tinged with 

 hemoglobin). 



Serum administered intraperitoneally Jan. 17, 1917, 11 a. m. 

 Toxin administered by the mouth Jan. 18, 1917, 11 a. m. 



CHART F. 



Potency Test of Botulism Antitoxin (Cow Serum C defibrinated 



blood). 



Serum administered intraperitoneally Feb. 2, 1917, 2 p. m. 

 Toxin administered by the mouth Feb. 3, 1917, 2 p. m. 



The Relation of Botulism Antitoxic Serum to an 

 Organism Isolated from Horse No. 91. 



The anaerobic bacillus isolated from the caecum of horse 

 No. 91 closely resembled B. botulinus morphologically and cul- 

 turally, but in order to establish specific evidence of such rela- 



