82 THE COW IN HEALTH AND DISEASE 



chest rubbing together when an animal has 

 pleurisy and when it has been heard a time or 

 two, it is very easily recognized in subsequent 

 cases. 



By tapping or striking over the diseased 

 part we are sometimes able to tell of the con- 

 dition of the part from the sounds that are 

 produced. The lung in health is always filled 

 with air and due to this fact, a hollow reso- 

 nant sound is produced when tapping or strik- 

 ing above the part. 'Usually this is done by 

 placing the left hand flat upon the chest and 

 tapping upon it smartly with the first three 

 fingers of the right hand. The left hand is 

 moved over the region of the lungs and we are 

 sometimes able to recognize a filling of some 

 parts of the lung, with a fluid or a solidifica- 

 tion of a part of the lung. This is another 

 means of diagnosis that can only be acquired 

 by diligent and persistent practice. 



"Cold in the Head." 



This condition is also known as catarrh of 

 the head or sometimes as rhinitis. 



This condition is usually mild and very sel- 

 dom fatal, but if complicated by a severe sore 

 throat it is sometimes fatal. It is most often 

 brougth about by animals that are accustomed 

 to shelter, being exposed to damp or stormy 

 weather. It may also be caused from irritat- 

 ing or noxious gases. At first a reddening of 



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