358 Veterinary Medicine. 



or suppressed sound of the cough ; 4th, Sometimes, especially if the 

 gas is abundant, prominence of the chest on that side ; 5th, There 

 are also more or less distress and anxiety, difficult breathing, quick, 

 weak, rapid pulse, and other signs of illness. 



Some cases of this kind recover spontaneously or with the 

 withdrawal of the liquid effusion with which they are associated ; 

 in traumatic cases the wound is sometimes sealed up by a pleuri- 

 tic exudation which here becomes a curative process ; while in 

 some examples of valvular wound of the lung or walls of the 

 chest, death may ensue in a period varying from a few minutes 

 and upwards to weeks. 



Treatment is limited to the prevention of the ingress of air 

 through an external wound where that exists ; the employment of 

 opiates and other agents to moderate attendant suffering ; to 

 measures calculated to moderate the intensity of resulting pleu- 

 risy, and, in cases where there is imminent danger from accumu- 

 lation of gas, to the puncture of the chest and the careful withdrawal 

 of the gas by aspiration. If necessary sterilized air may be 

 made to replace the aspirated gas. 



