i88 Veterinary Medicine. 



its easy passage outward. This state of lung differs materially 

 from the consolidation due to inflamed lung tissue (hepatisation). 

 When cut it does not present the granular appearance of the lat- 

 ter, caused by the exudation into the minute air cells, but the cut 

 surface has an uniform homogeneous aspect aptly likened by 

 Lsennec to muscular flesh (splenisation). Mendelson, Traube 

 and Gairdner have induced artificial collapse of the lung by in- 

 troducing foreign bodies into the bronchia of animals. 



Emphysema of the margins of the lung is a frequent Concomi- 

 tant of collapse. The cause is plain. The portion of lung, the 

 subject of collapse, emptied of its air, does not occupy a tithe of 

 the space it would normally fill. The rest of the lung tissue ex- 

 pands unduly to fill out the vacated portion of chest and the cells 

 become over-distended and ruptured. The emphysematous lung 

 is known by its lighter color, by its irregular bulging surface, by 

 the subsidence of these elevations when pricked with a needle, 

 and by a more marked crepitation when pressed. When the cells 

 have burst and the air escaped into the areolar tissue between the 

 lobes, it appears as dark lines circumscribing small portions of 

 pulmonary tissue and collapsing when pricked. 



Treatment. The mildest cases will recover of themselves, 

 especially if care is taken to protect the patients against cold, wet, 

 draughts of cold air, over-exertion, and other injurious causes, 

 and to give a part of the food warm and sloppy. In severe cases 

 treatment must be more active, but it will be borne in mind that 

 severe depletive measures are badly endured. Bleeding danger- 

 ously increases the already existing weakness and prostration 

 without affording any corresponding advantage. It is only ad- 

 missible when from the severity of the symptoms in the early 

 stages suffocation is threatened or when the brain becomes in- 

 volved in disease. 



Causing the patient to inhale water vapor from scalded bran or 

 hay is to be assiduously carried on for half an hour to aia hour 

 twice or thrice daily until expectoration has been freely established 

 and the cough and fever alike moderated. The density of the 

 vapor must of course be apportioned to the particular case so as 

 to avoid any approach to suffocation. The addition of the fumes 

 of burning sulphur will often by their astringent and antiphlogistic 

 action on the mucous membrane, render the vaporous application 



