284 EOAEING. 



Since the mode now recommended occurred to me, I have 

 tried it in many instances, and upon every occasion with suc- 

 cess. "Whether the animals would have been Eoarers if the 

 operation had not been performed, I am unable to say ; as it is, 

 however, not one has been left either a Wheezer, a Piper, or a 

 Eoarer. 



Peevention of the Eoaeing Sound. — The plan I shall 

 state for the accomplishment of this, in those horses which are 

 confirmed Eoarers, is one lately propounded by Mr. Eeeve, 

 veterinary surgeon, of Camberwell. In order, however, that 

 the reader may perfectly understand the nature of the plan in 

 question, it is necessary to state one or two important facts in 

 relation to it. The immediate cause of the roaring sounds is 

 the narrowing of the laryngeal opening ; or, in other words, the 

 roaring sounds are produced because a column of air is passing 

 through the nostrils towards the lungs, the diameter of which is 

 greater than can pass directly (or at once) through the opening of 

 the larynx. 



Taking this into consideration, Mr. Eeeve " thought it pos- 

 sible," in a case which was submitted to his skill, " to so modify 

 the atmospheric supply to the lungs, that during exercise, the 

 volume of air, when it arrived at the glottis, should not exceed 

 that which passed through its opening when the horse was 

 tranquil, and which (from the fact of the sound being absent) 

 does not at that time produce Roaring." 



"A strap," he continues, "was accordingly made to pass 

 around the nose of the horse, just over the region of the false 

 nostrils, and buckle beneath the lower jaw. To the inner sur- 

 face of this strap, and immediately over the false nostril on 

 each side, was fixed a body resembling in shape the half of a 

 hen's egg, cut longitudinally. When applied, these bodies 



