558 Report on the Health of Animals of the Farm. 



to pressure. The pulse was high and the breathing increased, 

 and all the ordinary symptoms of sympathetic fever were present. 

 The swelling rapidly increased, and although it partook of the 

 hardness which belonged to the other case, the more fluid portion 

 of the exudation matter gravitated to the inferior part of the 

 abdomen and produced considerable oedema. The progress of 

 the disease was more rapid than in the other calf, and the 

 sufferings of the animal more severe. 



Death took place during the night of the 19th. The j^ost- 

 mortem examination showed extensive effusion of yellow-coloured 

 lymph, as in the other case, into the areolar tissue external to the 

 chest, the muscles being in precisely the same condition. 



The lungs in this instance also were found to he perfectly 

 free from disease, and the only change which had taken place 

 in the thorax was an effusion of a very small quantity of reddish- 

 coloured lymph on the external surface of the pericardium. 

 The viscera of the abdomen had, however, suffered to some extent. 

 Partial peritonitis, associated with adhesion of the rumen to the 

 diaphragm, existed on the left side. Slight ascites was also 

 present ; but a lesion which attracted more attention was an 

 effusion of nearly colourless lymph into the structure of the spleen. 

 Deposits also of the same material existed here and there upon 

 the surface of the peritoneum. 



These experiments must be regarded as of considerable im- 

 portance in determining the question. By what means does 

 Pleuro-pneumonia extend the area of its existence? That the 

 disease cannot be produced by any artifical means — so to speak — 

 every experiment carried out by Professor Brown and myself has 

 fully established. So conclusive are these proofs that further 

 investigation in this direction seems quite unnecessary. 



By cohabitation of healthy animals with the diseased, Pleuro- 

 pneumonia has alone been found to spread. 



It only remains for me to add that several investigations of 

 various diseases have been made by Assistant Professor Axe, 

 during the past six months, on the respective farms where they 

 occurred, and that his Reports are attached as an addendum to 

 this communication. 



1. Heport of an Investigation of a Disease in a Herd of Cattle, the 

 Property of Colonel Cokyton, Pentillie Castle, Cornwall. 



On the 2nd of April I visited Pentillie Castle, and examined a herd of 

 cattle, the property of Colonel Coryton. Three animals (milch cows) had 

 already died, and four others I found to be suffering from the effects of the 

 malady. The symptoms exhibited by the affected cattle, as well as the lesions 



