SESSILE AND HUMORAL ANTIBODIES 23I 



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DISCUSSION 



Medawar: In some of your earlier experiments on synergistic action, 

 you were dealing with the influence of very small doses of antiserum — 

 0*5 [xl. in one case — on the kind of reaction produced by 2-2-2-7 million 

 sensitized cells. Do you know what titres of humoral antibodies are 

 produced merely by the sensitized cells themselves ? — because this must 



