Fig. SS 



Receptors of the 2d order (Ehrlich) . 



Fig. 1. — Normal cell, "with mmltiple specifi- 

 cally receptive molecular groups. Attacking 

 antigen (^-^). 



Fig. 2. — Cell attacked at specifically recep- 

 tive point by antigen ( — ^). This may be 

 bacteria, bacterial extractives, or proteins, 

 formed or amorphous. They stimulate the pro- 

 duction of agglutinins, coagulins, precipitins, 

 etc. 



^t 



fi^^ 



Fig. 3. — Cell with equilibrium disturbed, by- 

 union of receptive cell moleeule -with, its 

 specific antigen 



(^: 



Fig. -4. — Cell in hypereompensation in effort 

 toward repair. Excess of bio plastic matter 

 seen (O-p)- This represents the antibodies: 

 precipitins, agglutinins, etc., of this order. 



Fig. S. — Cell restored. Excess of antibodies 

 float free. One seen in combination with its 

 antigen. 



