STUDIES ON H.EMOLYSIXS. 



115 



which we proved that a particular immune body present in small 

 amounts and not diverted by our anti-immune body, finds a comple- 

 ment in its own serum which, in contrast to the other complements, 

 is present also in goat serum. 



Three things have thus been established: 



1. Each normal serum contains a number of different com- 



plements ; 



2. In different animals a part of the complements present are 



either completely similar or at least similar in their hap- 

 tophore groups; 



3. The immune bodies obtained in an animal species represent 



a number of different complementophile groups. 



As a result of this demonstration the question whether or not 

 the resultant immune-body mixtures obtained in different animals 

 are identical in their complementophile portion loses in interest at 

 least so far as the problems under discussion are concerned. 



Hence we should merely, like to add to the results obtained by 

 activating the immune body of a rabbit immunized with ox blood, 

 the results of a parallel series of experiments made at that time 

 with the same amounts of reactivating sera but with the immune body 

 from a goose immunized with ox blood. (See Table XII.) 



TABLE XII. 



This table again shows that the Unitarian view, according to 

 which each serum contains only a single complement, lacks all prob- 

 ability, for it is to be expected that in that case the zoological rela- 

 tionship of certain animal groups would manifest itself in their com- 

 plements to a greater degree than it actually does. When, for 

 example, we here see that the rabbit immune body is not reactivated 



