ILLUSTRATIONS 
TEXT FIGURES 
Fic. 1. Illustrating the age incidence by decades. 
2. Showing seasonal incidence. 
3. Showing the response of the patient to the administration of the 
serum per rectum (enema). Patient G. R. 
4. Showing the effect of serum administered intramuscularly and per 
rectum (enema). Patient G..A. 
5. Showing the effect of serum administered intramuscularly and per 
rectum (enema). Patient F. D. 
6. Showing the effect of serum administered intravenously. Patient 
8..T; 
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