-556 Report on the Healtli of Animals of the Farm. 



On June 20th, six drachms of serous fluid from the diseased 

 lung of a cow were injected, as in the former instance, into the 

 left lung of one of the calves, and the same quantity into 

 the trachea of the other, by puncturing the tube in its lower 

 cervical portion. No bacteria or bacteridies were detected in 

 the fluid. 



The temperature of one animal registered 103° and the other 

 103*3°. The injection of the fluid into the trachea produced an 

 immediate cough, by which a small quantity of it was driven 

 upwards and expelled by the nostrils. Little or no pain seemed 

 to attend the injection into the lung. Careful observations were 

 daily made down to July 6th, and the temperature noted from 

 time to time without any deviation from health being detected in 

 either animal. On this day — the sixteenth from the date of the 

 experiment — a swelling of the neck came on in the animal into 

 whose trachea the serum had been injected. It somewhat rapidly 

 increased, and in the course of a couple of days extended from 

 the angle of the jaw to the chest. It was remarkably hard to the 

 touch, but not very sensitive or hot. Symptoms of sympathetic 

 fever set in, and the temperature rose to 106'4°. 



In connection with the progress of this case, and also with the 

 -other, it is important to notice that the weather had now become 

 excessively sultry, and continued so to nearly the end of the 

 month, with very slight variations.. This, doubtless, had much to 

 do with the untoward result of both experiments, but at the same 

 •time it gives additional interest to them pathologically, and 

 confirms the experience of persons who have recourse to inocu- 

 lation as a preventive of Pleuro-pneumonia during the prevalence 

 of a high temperature. 



During the next two days the neck of the animal increased so 

 much in size as mechanically to interfere with respiration. The 

 animal's appetite likewise failed, and the febrile symptoms be- 

 came more aggravated. The temperature, however, only rose 

 -j2^ higher, viz., to 106 '6. So far as attention to dietetics and pro- 

 tection from the rays of the sun could afford relief, every attention 

 was given to the animal ; but, with the exception of fomentations 

 to the neck, nothing was done medically to arrest the progress of 

 the disease : indeed it was all important, to the end sought to be 

 obtained, that the malady should run its natural course. The 

 animal bore up better than was expected, and remained much 

 in the same condition up to July 20th, when it was determined 

 to kill it for the purpose of making a post-mortem examination. 

 This resolve was influenced by the circumstance that the other 

 calf — whose case has to be mentioned more in detail — died this 

 /day. 



The post-mortem examination showed that the swelling of the 



