avery's own farrier. 237 



canal, &c. The upper part of the wind-pipe is called 

 the larynx; the lower part, the trachea. 



Acute, and sometimes chronic, or slow lingering in- 

 flammation of the larynx, takes place; it is generally 

 brought on by hard colds, though sometimes it is caused 

 by eating too early mown or dusty hay, the pollen from 

 the flowers of which consists of a very fine flour, very 

 irritative to this part of the thorax, which is particularly 

 sensitive. ^This difficulty is frequently taken by many 

 for lung fever, the heaves, &c. ; but is unlike either, ex- 

 cept in difficult breathing, as drawing in of the sides 

 with a long breath. It is attended with some fever, 

 quick pulse and costiveness; the breathing becomes more 

 and more difficult, and, unless relief is found, the horse 

 dies from actual suffocation. This disease will warrant 

 heavy bleeding, and treat as you would for distempers, 

 with a free use of the condition powders No. 1, herein- 

 after mentioned. 



Death beginning at the Lungs. — As in suffocation, the 

 circulation and the organic functions cease; the animal 

 is said to be alive so long as any of the organic func- 

 tions are going on. The heart continues to act after 

 respiration has ceased; the ventricle of the heart con- 

 tinues to propel the blood to all"*parts of the body, but 

 the blood is now incapable of supporting life, and a few 

 waves to the brain destroys its functions, and the blood 

 from want of aeration in the lungs, destroys the action 

 of the heart itself, and every part through which it cir- 

 culates; but at what particular time they become insensi- 

 ble to pain, must for all time to come remain unknown. 



