The unit of antibody, therefore, was 0.2 cc. Using 

 this unit of antibody and varying the amount of comple- 

 ment, the unit of complement was determined. Two units 

 of complement were used in running the complement-fixation 

 test, also two units of hemolytic antibody. Each bacter- 

 ial antigen was nob tested against each of the three anti- 

 sera. The results of such tests are shown in the follow- 

 ing proctocols: (The preliminary titrations of antigens 

 and antibodies are purposely omitted because they vary 

 with each lot and merely tend to confuse the reader. 



Table #6. Protein Antigen and Homologous Antiserum. 



