THE PRECIPITIN REACTION. 



97 



goo 



1007, 



3.1 3./ 3.1 



1007. u> so f t -f t 



FIG. 6. Comparison of the reactions of two anti-sheep sera from rabbits, the 

 homologous titers being quite different. 



TABLE XL 



REACTIONS OF ANTIDOG SERA. 



Pi 40 Antidog 

 Rabbit Filtered. 

 ioo % 

 12.5 

 12.5 

 12.5 



9.4 

 9-4 

 9-4 

 6.25 



Table XI. and Fig. 7 give the reactions of two antidog sera 

 obtained from rabbits. It may be seen that the correspondence 

 between these sera is not as close as with the rabbit sera given 

 before. This is true in spite of the fact that both rabbits were 

 injected with the blood from a single dog. 



