DISEASES OF THE CIRCULATORY ORGANS. 107 



3. Hypertrophy of the Heart. 



This is a secondary ailment, usually resulting 

 from the effects of parasites in the blood stream. 



4. Valvular Diseases. 



This is co-incident with, and caused by the same 

 pathological conditions as hypertrophy of the 

 heart. 



COUNTING Six THOUSAND. 



Sheep practice in the range country does not take the 

 veterinarian over paved streets or even surveyed roads. 



These diseases of the heart in sheep are rarely, 

 if ever, diagnosed during life. The chief object 

 in mentioning them is to enable the practitioner 

 to guard against invasions of similar nature in 

 the apparently healthy members of the flock. 



