554 



IMMUNITY 



power of clumping red blood corpuscles. This clumping or 

 so-called agglutination of the red cells occurs previous to their 



-a. 



I la 



Fig. 122. a, Comple- 



meni ; b, intermediary 



body; c, receptor; d, 



part of the cell. 



Fig. 123. A cell ivith different kinds of 

 receptors; b, cell ; c, c and d, different 

 kinds of receptors ; a, bodies having but 

 one haptophore or combining group of 

 atoms. 





Fig. 124. A cell shoiving the separation 

 of the receptors or antitoxin and the 

 combination of toxin 2uith free anti- 

 toxins ; c, cell; b,free receptor; a toxin. 



Fig. 125. A drawing 



shoii'ing the action of 

 anti-cotnplement; a, com- 

 plement ; b, intermedi- 

 ary body ; c, receptor ; d, 

 cell ; e, anti-complement. 



