CONTROL SERIES No. 63 



5 fo V 



NOMBELR or TE5T 



CRAPH 2— Evaluation of the Tests Which Were Made With Two Antigens, Each Pre- 

 pared from Cultures Retained at Different Temperatures 



135 

 130. 

 125. 

 120, 



y- 105 



< 100 



qo 

 65 

 80 



WUMBEK OF TE.5T 



-Evaluation of the Tests Which Were Made With Two Antigens, Each Pre- 

 pared From Cultures Transferred at Different Intervals 



