VI 



ft 6 8 10 12 ft If IS 



21 23 Z5 Z7 29 31 



>i to f2 ft 16 t 20 22 2>f 26 26 Z/ * 6 S 10 12 19 16 fl 



Curve No. 3 



power at the beginning of the experiment was 4. After 

 an injection of 40 cc. 48h culture of Vb. chol.. a curve' 

 was noticed quite similar to the above mentioned. Af- 

 ter a very insignificant fall on the first day the climax 

 was rapidly reached on the 8th day, followed by a 

 decrease, which was at first very sudden and afterwards 

 more gradual. 



In curve No. 4 is introduced a new species, the rabbit. 



During the 5 weeks, preceeding the experiment, the 

 three rabbits I, II and III had been immunised in exactly 

 the same manner at the same time with the same doses 

 of B. typhos. culture. On the 29 / 3 the agglutinating power 

 of rabbit I was 154, of rabbit II 40 and of rabbit III 7,7. 

 On the said day 1 cc. 24h B. typhos. culture was injec- 



