156 CLINICAL VETERINARY MEDICINE AND SURGERY. 



most reported cases heart lesions have either been compHcated by 

 others Hke pericarditis, or by emphysema, glanders, or tuberculosis ; 

 while the cavity of the right auricle has been found greatly enlarged, 

 owing without doubt to insufficiency of the tricuspid valve. 



When limited to one part of the auricle and only affecting the roof 

 or cul-de-sac, for example, ossification produces no appreciable sym- 

 ptoms, and is always a surprise on post-mortem ; but when extended to 

 the greater part, or to the entire auricle, particularly if the latter be 

 dilated, and the auriculo-ventricular opening more or less enlarged — 

 troubles occur which clearly suggest the existence of heart disease. 

 They include dyspnoea, palpitation, venous pulse, and at a later stage 

 swellings about the thorax and extremities. Even in presence of these 

 complications, however, exact diagnosis is impossible. The most one 

 can discover is that the disease is located in the heart. 



The various drugs which have been used all appear equally useless. 

 In point of fact no treatment is efficacious. 



