554 Report on the Health of Animals of the Farm. 



pig No. 2. Blood ff teen days old. Guinea-pig died during the 

 night succeeding the inoculation. 



These experiments correspond in their chief results with those 

 previously reported. Nevertheless, in the present state of the 

 subject of blood-poisoning, it would not be right to draw any 

 positive deductions froin so limited a number of experiments, 

 beyond the fact of the easy communicability of this class of 

 diseases from animal to animal. It may, however, be remarked 

 that, in one set of experiments, local effects only followed inocu- 

 lations with diseased blood which had been kept from four to 

 five loeeks ; and in the other, that death of the inoculated animals 

 took place when the blood had been preserved for the space of 

 fifteen days. 



It would also appear that carnivorous animals are less sus- 

 ceptible to the deadly effects of diseased blood of the kind em- 

 ployed than herbivorous. 



With regard to outbreaks of Splenic Apoplexy, they have been 

 fewer during the past six months than is ordinarily the case. Two 

 instances of the occurrence of the disease have, however, been 

 investigated ; but in neither were the losses so serious as often 

 happens. The particulars of these cases are described by the 

 Assistant Professor Axe, whose Reports are appended hereto. 



Pleuko-Pneumonia. 



Some additional experiments to those reported on a former 

 occasion have been instituted with a view to determine whether 

 or not Pleuro-pneumonia could be produced by means other 

 than the cohabitation of healthy with diseased animals. It was 

 first determined to ascertain whether any portion of the serous 

 exudation from the lung of an animal which had died of Pleuro- 

 pneumonia could safely be injected into the lungs. For this 

 purpose two sheep were selected, and a drachm of the serum. 

 injected into the left lung of each by puncturing the upper part 

 of the chest with a small tubular stilet fitted to a syringe. No 

 difficulty was experienced in performing the operation, and on 

 Avithdrawing the stilet the animals did not give any evidence of 

 acute suffering or pain. Indeed, they presently began to feed with 

 quite a natural appetite. They were kept under close observation 

 day by day, and their temperature registered, but no indications 

 of disturbed health were detected. Weeks passed away, and 

 during the whole time they remained healthy. 



Other experiments were now determined on, and on April 

 10th of the present year, two drachms of serous exudation from the 

 lung of a cow, the subject of Pleuro-pneumonia, were injected 

 into the left lung: of an eisfht-months-old heifer-calf. At the 



