ROARING AND WHISTLING. 265 



to time, such as blistering, firing, galvanism, etc., 

 but without any good and satisfactory results. I am 

 informed that there is a doctor living at Bicester 

 who has discovered an operation by which a cure 

 can be effected, and I am assured that the cure is 

 complete. If this is the case — and I have every 

 reason to credit my informant — it will prove a boon 

 to many a horse-owner. 



Since writing the foregoing I have, through a 

 friend, been placed in communication with the 

 gentleman referred to : viz., Dr. Cotterell, living 

 at Bicester, and in answer to my queries on the 

 subject, he replied most kindly and fully, and gave 

 me, at my request, his sanction to make any use of 

 his letters which I might desire. Amd as it may 

 interest some of my readers, I will quote such 

 portions as may be necessary. He writes : 



' Regarding my operation for roaring, after a 

 large and varied experience, I find that one can 

 certainly improve by my operation (not do away 

 with the noise), and thus increase the sta}dng 

 powers of a horse up to six years old ; but after 

 that age, owing to calcification of the arytenoid 

 cartilages, the removal of the left cartilage, together 

 with the corresponding false and true vocal cords, 

 gives the best result. 



1 My operation consists essentially in removing 



