BY DR. OSCAR KATZ. 



523 



The other white specimen was still alive, August 20th; meanwhile it 

 behaved in quite a normal manner, 

 (b) August 20th, 9.30 a.m. 



It was given cabbage-leaves with 3 ccm. of virulent broth-culture of the 

 microbes of the third generation. It began to eat at once, and had soon 

 finished. 

 Result : 



It was still alive, August 25th, not showing any symptoms of illness 

 all the time. Two control-rabbits (wild), of which one (full-grown) 

 received the same quantity of virulent material as the tame one, 

 namely 3 ccm., and the other (half -grown) only half as much, namely 

 1 1 ccm., were both found dead at 8 a.m. , August 21st. P.M. in each 

 case. Positive. 

 Cc) August 25th, 10 30 a.m. 



It was given 4| ccm. of an active broth-culture of the microbe of the 

 third generation, along with cabbage-leaves. It was not slow in doing 

 away with the portion of infected food given. 

 Result : 



It remained unaffected by this treatment, whereas a vigorous wild 

 Tasmanian rabbit, taken as control, was observed to die at 8.30 a.m., 

 August 26th, or about 22 hours after feeding. The cause of death, 

 " chicken-cholera." 



(d) September 1st, 4 p.m. 



It was inoculated, subcutaneously at the left side of the belly, with 

 ^ ccm. (2 minims) of a virulent broth-culture of the microbes, obtained 

 directly from the blood of a rabbit which died after feeding with those 

 microbes. It outlived this operation, whereas a control rabbit (wild) 

 was found dead (from the disease) at 8 a.m., September 2nd. At the 

 seat of inoculation, however, in the case of the tame rabbit, was formed 

 a large abscess, at first closed, but beginning to open five days after 

 inoculation, thereby discharging a sticky, yellowish, inodorous pus. (A 

 platinum -loop full of the latter was inoculated into a wild rabbit, at 

 12.45 p.m., September 10th. This animal was found dead at 7.30 a.m., 

 September 13th, having perished from causes independent of "chicken- 

 cholera"). 



The abscess healed slowly ; the healing process was completed in the 

 beginning of October. 



(e) October 10th, noon. 



The rabbit received injected, on a corresponding spot on the right side 

 of the belly, ^ ccm. (2 minims) of fresh heart-blood from a rabbit out 

 of those recorded in Table III., Series X., No. 19). As control- 

 animals may be taken, on the one hand, the two rabbits from Series Xl.y 



