Till-: I'RI'.CII'ITIX Kl \( I h >\. 



99 



duced in a rabbit corresponded closely with one produced in a 

 chicken. In the second place, the relative relationship of two 

 different animals should be the same whichever one of these is 

 used as primary antigen. For instance pig should bear the 



TABLE XII. 



REACTIONS OF ANTIHORSE SERA. 



4-500 



00 



ioo'/o 



t 3 3 



d> 1.5 O IS O 



Ati 



I/I 



FIG. 8. Comparison of two anti-horse sera from rabbits. 



