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FRANK C. BECHT AND JAMES R. GREER 



plement-like body plays a role in agglutination. They used ox 

 corpuscles, rabbit serum immune to ox blood, and guinea-pig serum 

 as complement. They do not make the claim that the complement 

 and the agglutinin are identical, merely that this form of complement 

 behaves like hemolytic complement, is thermostable, and acts only 

 when suitable amboceptor is present. They are not sure whether or 

 not this is the same complement concerned in hemolysis. In the 

 course of our experiments we found some evidence which points in the 

 opposite direction; viz., addition of complement or at least of rabbit 

 serum, as in one experiment, inhibits the agglutination of rabbit 

 corpuscles by the fluids of an immune dog. 



TABLE 5. 

 THE INHIBITION OF THE AGGLUTINATION OF RABBIT CORPUSCLES BY THE BODY FLUIDS OF AN IMMUNE 



DOG BY THE ADDITION OF RABBIT SERUM. 



(150 c.c. rabbit blood intraperitoneally, February 16. Fluids drawn February 26. 

 o.i c.c. rabbit serum as complement.) 



Corpuscle control=o. Complement control=o. 



This experiment shows that the addition of rabbit serum as com- 

 plement instead of favoring agglutination as in the case; observed by 



