PLURALITY OF COMPLEMENTS OF THE SERUM. 



207 



pig serum with the view of separating the complements by care- 

 fully heating the sera. In the dog serum a half hour's heating to 

 49.5 and in the guinea-pig serum to 49 was sufficient to enable 

 us, by means of the differences of the weakening of the various com- 

 plementing functions, to recognize here also the plurality of the com- 

 plements. The results of these experiments are shown in Tables VIII 



and IX. 



TABLE VIII. 

 HALF AN HOUR'S HEATING OF DOG SERUM TO 49.5 C. 



TABLE IX. 

 HALF AN HOUR'S HEATING OF THE GUINEA-PIG SERUM TO 49 C. 



