646 



rabbit 



A after 2 days after 5 days after 7 days after 10 days 



8 I'l, weak 1/50 Viou Vsu. 

 X < Vio Vin weak i/ion weak i/^jo 



9 Vi(. weak i/io Vsuo weak 



17 Vio , 



C 



12 <Viu 



R < Vio 



D 



21 Vio 

 33 Vio w'eak 



24 1/10 weak 



18 Vio . 



M Vio weak 



22 Vio 



25 Vio 



14 < Viu 



H 



16 Vio 



15 Vio weak 



As far as results are to be drawn from this series — for the 

 rabbits have not been exactly' injected in proportion to the weight 

 of their body — there does not seem to exist a great difference betw^een 

 the various rabbits. The final result is somewhat better with A and 

 B than with the others ; but the differences are small. The strongly 

 sensitized red cells (150 doses !) also had immunisation powei'. 



At last I have made two more series of experiments, upon which 

 I will not dwell at length ; with those the rate of amboceptor with 

 all the animals remained too low to be exactly measured, probably 

 by injecting too little blood : in one series no differences Vere to be 

 found, in the other the nonsensitized blood immunized a little better, 

 but the differences were small. 



The final conclusion to be drawn from these series of experiments 

 may now follow : 



In general one also succeeds in rousing amboceptors with sensitized 



