VIII 



AGGLUTINATION OF B. PUSTIS 



227 



One of these guinea-pigs died December 23. The 

 animal was extremely emaciated, but no cause for its death 

 could be found. 



The blood serum was tested (dilution 1 : 20) : — 



10. The half-grown guinea-pigs Nos. 11 and 12 were 

 injected intraperitoneally, each receiving 10 cc. of the 

 filtrate : — 



The tests with the blood serum were made as above, 

 but with completely negative result. 



11. Two half -grown rabbits, Nos. 7 and 8, were 

 subcutaneously injected with the same filtrate, each 

 animal receiving 20 cc. : — 



[Table 



