189 



Sera (1 : 25, 1 : 50 etc.) 



Cultures 133 134 135 136 137 



132 0000000 ++++(+)00 0000000 ++(+)0000 +++0000 



133 ++++000 (+)(+)00000 0000000 (+)(+) (+)(+)000 ++00000 



134 0000000 ++++000 0000000 ++00000 +++0000 



135 0000000 ++00000 +++++00 +++0000 ++++000 



136 0000000 (+)(+)00000 (+)(+)00000 +++++00 ++++(+)00 



137 0000000 (+)000000 0000000 +++0000 ++++++0 



(No distinction is made here or in later experiments between 

 different grades of complete agglutination). 



The following absorption experiment (with serum 1 : 20, culture 

 in a concentration 5, and subsequent agglutination in dilutions of 

 1 : 25, 50, etc.) was then made, using simple agglutination as a 

 control. 



