DISEASES OF THE RESPIRATORY SYSTEM. 147 



and water to make a pint; one fluid ounce can be given as a dose, 

 and this contains four (-1) grains of arsenic. The dose of arsenious 

 acid varies from two to seven grains. 



Fowler's solution is colored with lavender to keep people from 

 drinking it by mistake; give one ounce three times a day; this will 

 often relieve some of the most urgent symptoms. 



Nux vomica, iron, potassium iodide, are often beneficial, as 

 are internal antiseptics and stomachics. 



5. DISEASES OF THE PLEURA. 



PLEUEISY. 



Give the synonyms. 



Pleuritis; inflammation of the pleura. 



Name the forms. 



Acute, subacute, suppurative, interstitial. 



Define the various forms. 



Acute or plastic pleurisy is a fibrinous inflammation of the 

 pleura, and is the form mostly seen in the dog. 



Subacute, or pleurisy with effusion, also called sero- fibrinous, 

 is an inflammatory process with a large amount of serum. This 

 is the form most frequently seen in the horse. 



Suppurative pleurisy, or empycema, is where pus-cells are 

 formed. 



Interstitial, or adhesive pleurisy, or chronic pleurisy, is where 

 new connective-tissue formations take place. 



What is the aetiology ? 



Pleurisy is not infrequently met with in the young green 

 horses, in the dealers' stables. The dealers probably lose more 

 from pleurisy than any other disease — that is, as complications from 

 other diseases. 



Pleurisy is one of the most fatal diseases affecting the equine 

 race. 



It arises from traumatic injuries, a wound penetrating the 

 muscles in the intercostal spaces, or it may be secondary to other 

 diseases, as pneumonia, when it is called pleuro-pneumonia, or pneu- 

 monia complicated with pleurisy. 



