302 ; DISEASES OF THE EYE. 



been recorded where a number of affected lambs in a flock were 

 all got by one ram which had the disease. Lambs from flocks in 

 certain localities have been attacked enzootically at various sea- 

 sons. Low sitr_ations or a damp atmosphere upon elevated situ- 

 ations, according to Williams, will act as a cause of bronchocele. 



Symptoms. 



Swelling immediately under the larynx, at one or both sides 

 of the trachea. This may not increase in size very rapidly, and 

 in some instances tends to diminish and disappear of its own ac- 

 cord. "Where the gland increases in size so as to compress the 

 trachea and interfere with deglutition as well, an operation for 

 removal of the gland might be permissible. 



Crcatment. 



Consists in the administration internally of iodide of potas- 

 sium in full doses, also giving once a week a cathartic dose of 

 Epsom or Glauber salts. The wool should be clipped from 

 affected surface, and the parts painted with iodine, or the com- 

 pound ointment of iodine applied. Goitre, due to cancerous 

 invasion, such as carcinomatous goitre, should be sufficient cause 

 for slaughter of the animal. The meat on no account should 

 in this instance be offered for human consumption. Removal of 

 the affected gland or glands is not liable to result satisfactorily, 

 in that, the subject will become checked in its growth, and is 

 liable to anaemia with marked debility. There would be noth- 

 ing to recommend this operation so far as sheep are concerned. 



Diseases of the 6ye. 



The sheep frequently suffers from eye affections, as do other 

 of the lower order of animals. Many of these disorders are 

 liable to produce permanent blindness, which is less noticeable 

 in sheep than in other animals from the fact that their hearing 



