108 THE LUNGS. 



obstructing them, produces a noise, varying in 

 character according to the seat, and degree of 

 the disease. 



The obstruction is rarely so great as to produce 

 any noise in the breathing while the animal is 

 at perfect rest. He should therefore be mount- 

 ed, and get a giillop, either up hill, or in deep 

 ground, or sufficiently far on any ground, to in- 

 crease the breathing ; and if the examiner does 

 not ride, himself, he should stand close to the horse 

 as he comes in, that the unnatural noise, if there 

 be any, may be the more readily heard. When 

 the dealer wants to conceal the noise of roaring, 

 &c., he takes the horse out a considerable dis- 

 tance before putting him to the gallop ; and in 

 returning he slackens the pace, so that the 

 breathing may become tranquil before the horse 

 reaches the examiner. This is called the " long 

 trot." 



Roaring of all kinds constitutes unsoundness. 



Immediately after the horse has been gallop- 

 ped, notice should be taken whether the acceler- 

 ation in the breathing be greater than it usually 

 is by the same exertion in a healthy horse: 

 for, if the lungs are diseased, the breathing will 

 be more or less laborious. Some allowance, 



