BY DR. OSCAR KATZ. 561 



One received l-16th ccm. = 1 minim 1 ^^ ^^^^ ^^^^^ 



The o<^er received 1 -32nd ccm. = J minim J 



Results : 



November 15th. — The one which had been inoculated with 1 minim 

 of blood, was found dead at 7.30 a.m. P.M., Positive. (Appearance 

 of the organs resembling to some extent that of the organs of poultry- 

 dead of chicken-cholera. Immense numbers of typical bacteria in 

 the blood.) 



December 1st. — The other which had received only 5 minim of 

 blood, was still alive on this date, when it was used otherwise, as 

 will be seen below, 

 (ii) November 13th, 12.35 p.m. 



Four crows which were accommodated in a commodious specially- 

 fitted stall in the shed, and which had not been treated so far, were 

 fed on the livers of two rabbits which had succumbed to '^ chicken- 

 cholera " on feeding. 



Annotations : 



(1) The crows, although not being fed on the morning of that day, 

 were very slow in eating the pieces of liver placed in their stall on 

 a soup-plate. 



(2) The feeding had, from want of rabbits at the time, to be dis- 

 continued until later (vide below). 



Result : 



December 1st. — The four crows were still alive, 

 (iii) December 1st to 7th. 



In the stall which contained the above four crows, and into which was 

 turned the one which had been inoculated previously with | minim of 

 virulent blood, were placed, for seven consecutive days, in the mornings, 

 the carcasses, each time, of two rabbits which died of "chicken- 

 cholera " on inoculation (in connection with the desiccation experi- 

 ments (,p. 572). 



Annotations : 



(1) The dead rabbits {fourteen in all), before being given to the 

 crows, had been deprived of their entrails (with the exception of liver, 

 kidneys, heart, and lungs), and as there were more on hand than 

 were required at the time, they were kept in a cool place, so that the 

 carcasses were still fresh when placed in the crows' stall, with the 

 exception of one (out of the last feeding) in which putrefaction had 

 already set in. 



(2) During the above-mentioned period the crows did not receive 

 any other food. Water, of course, was always provided. 



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