Fig. 1. 



diageamjiatic ri;presentation of the bouies concerned in, and the consecutive stages of, the immunization process. 



1. Phagocyte. 



2. Antigen. 



3. Toxin. 



i. Complement. 



5. Fixed tissue 

 cell. 



6. Aiiti-toxin. 



7. Amboceptor. 



la. — Position at commencement of 



16.— Production of, and lines of attack 

 by, Toxin (3) ; Pliagooyte retreating. 



Ic— Produp.tion of Anti-toxius (6). 



IfZ.— Neutralization of Toxins by Anti-toxir 

 production of Amboceptor (7). 



le. — Excess Anti-toxins after neutralization 

 of loxins ; Amboceptor attached to 

 complement. 



i/- — Amboceptor-complement molecule 

 and Phagocyte advancing to 

 attack invading organisms. 



ly. — Amboceptor-complement molecule 

 attached to invading organism. 



Ife.— Phagocytosis of invading organism. 



available Anti-toxin and Ami 

 ceptor 1 



