X Preface, 



occasions Roaring, and the devising of measures for its 

 prevention and cure. I earnestly hope that obscurity and 

 incurabiHty will no longer pertain to it, and that the in- 

 vestigations, as well as the surgical procedure which is 

 here described, and which has been already fully carried 

 into operation, may remove Roaring from the list of the 

 opjjrohria medicoi'iim that still discredits Veterinary 

 Science. 



The value of a simple operation which will remove this 

 defect in horses, without disfiguring them or impairing in 

 any way their usefulness, can scarcely be over-rated, so far 

 as horse-owners are concerned ; while, in the interests of 

 humanity, the relief from distress in breathing in horses so 

 affected must be no small gain. 



Since first venturing on operative procedure in the 

 horse's larynx, ten years ago, much light has been gradually 

 thrown upon the physiology of that organ by the attempts 

 made to remove the immediate cause of Roaring ; and now 

 its interior is as accessible to the eye, hand, and instru- 

 ment of the surgeon, and can be treated with almost as 

 much impunity, as any other part of the body. This 

 marks a great advance in veterinary surgery, and one 

 which, no doubt, will largely benefit horses and their 

 owners. 



The institution of this operation has also resulted in 

 an immense improvement being effected in the mode of 



