REACTING POTENCY 293 



bodies; and by injcdion ol tlie antigen into the site prepared 

 with bacterial active principles in rabbits possessing actively 

 accjiiired antibodies. 



Here again, it is necessary to employ bacterial acti\e principles 

 ol the piienonienon lor elicitation of reactivity to the antigen-(- 

 antibody complexes. Allergic inflammation and inflammation 

 induced with turpentine fail to induce the state of reactivity. 



Bacterial active j)rinciples introduced into the general circula- 

 tion may become flxed in sites of allergic inflammation and elicit 

 in these sites a state of reactivity to reacting factors of antigen -|- 

 antibody complexes or to bacterial active principles. 



The state of cutaneous reactivity to reacting factors of the 

 antigen+antibody complexes may be elicited by live B. C. G. 



