ISO 



LECTURES ON IMMUNITY 



Morgenroth and I examined the absorption of an im- 

 mune-body, prepared by the injection of red corpuscles 

 of ox-blood into the veins of a rabbit. Another series of 

 Morgenroth's experiments was carried out with inactivated 

 (heated) serum from a goat injected with sheep's erythro- 

 cytes. Different solutions of the immune-bodies their 

 strengths in an arbitrary unit are tabulated under T- 

 were treated with a constant quantity of erythrocytes from 

 ox or sheep for about one hour at low temperature and 

 then centrifugalised. The centrifugated liquid was exam- 

 ined for its concentration, B, of immune-body, by the 

 addition of normal serum of the guinea-pig, and measur- 

 ing the haemolytic power of the haemolysin produced. 

 The difference, C, was absorbed by the red blood-cor- 

 puscles. Beside the observed figures, -# ob8 ., for the quan- 

 tity of free immune-body, are written figures for -# ca ic.> 

 calculated by the aid of the same formula as that found to 

 be valid for agglutinins. The constants, K, of the formulae 

 were calculated to be 18.3 and 39.5 respectively. 



ABSORPTION OF IMMUNE-BODIES BY RED BLOOD-CORPUSCLES 



