VIII 



Bomstein 1 ), concerning passive immunisation of dogs 

 and guinea-pigs with diphtheria antitoxin. 



Dog I. Dog II. 



n = 0,2 ii = 0,2 



c t = 3,2 c,== 3,2 



c = 0,15 c == 0,19 



t x obs. x calc. t x obs. x calc. 



3,0 3,0 3,0 3,0 



4 1,5 1,3 4 1,0 1,0 



8 0,6 0,6 8 0,5 0,5 



12 0,3 0,3 12 0,2 0,25 



Dog III. Guinea-pig. 



n = 0,2 n = 0,2 



c,= 3,3 c,= 2,316 



c == 0,18 c = 0,137 



t x obs. x calc. t x obs. x calc. 



2,5 2,5 15,0 15 



4 1,0 0,95 4 6,0 5,2 



8 0,4 0,4 8 2,5 2,2 



12 0,2 0,2 12 1,0 1,0 



16 0,5 0,53 



Bul loch 2 ) has examined the durability of passive 

 diphtheria immunity in the case of an ass. A calcula- 

 tion from his figures gives the following result: 



n = 0,6 



c t = 14,35 

 c = 0,2 



!) Bomstein: Zur Frage der passiven Immunitat bei Oiphtherie. Ccntralbl. f. 

 Bakt. etc. XXII, 1897, p. 587. 



2 ) Bulloch: The durability of passive diphtheria immunity. The Journal of Patho- 

 logy and Bacteriology. Oct. 1898. 



