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N. S. FERRY AND ARLYLE NOBLE 



SUMMARY OF AGGLUTINATION EXPERIMENTS 



1. Sera of high agglutination titre (1-3200 to 1-10000) were 

 produced in rabbits by three intravenous injections of killed un- 

 heated vaccines of B. bronchisepticus and of Perez' Bacillus 



2. All the strains of Perez' Bacillus used were identical by 

 agglutination test — each antiserum agglutinating all strains 

 equally well. 



3. All strains of B. bronchisepticus were identical. 



4. There was no cross agglutination between B. bronchisep- 

 ticus and Perez' Bacillus. 



