164 PRACTICE OF EQUINE MEDICINE. 



Where gangrene of the lungs takes place, or where air-cells 

 rupture in pulmonary emphysema, these cases are diagnosed by as- 

 piration. 



Dyspnoea, temperature low, and signs of collapse. 



What is pneumo-hydrothorax ? 



This is a condition with air or gas and liquid in thoracic cavity. 



Define pyo-pneumo-hydrothorax. 



This is a condition with pus, air, and liquid in pleural cavity. 



What is meant by haemato-pneumothorax ? 



This is a condition with blood and air in thoracic cavity. 



What is understood by the term pneumo-nokoniosis ? 



This is a term used to denote diseases of the lungs due to the 

 inhalation of particles of dust, causing a discoloration of the lungs. 



Horses used near mines breathe in coal-dust, or stone-dust, or 

 metallic dust. 



