FIG. 14. 



Death resulted in this guinea pig in 25 hours following the administra- 

 tion of 0.5 cc. of broth culture of an anaerobic organism (c-91) regained 

 from caecum of horse No. 94. 





FIG. 15. 



Test of goat serum (F & G) immune to B. botulinus; control dead in 



24 hours. 



FIG. 16. 



Serological relation of botulism antitoxin (goat serum) to organism 

 c-91. Antitoxin apparently protected the three treated pigs. 



