THE HORSE—THE RESPIRATORY ORGANS. 119 
pus may escape into the nose or the throat, or pass through the skin by an 
ovening at the angle of the jaw. If it escape by the nose, the discharge is 
usually from one nostril, and the glands under the jaw are enlarged. There 
may be no pus on the other side, or it may be there shut up and solidified. 
The nasal discharge comes and goes at regular or irregular intervals. 
When the matter passes into the throat, it threatens suffocation. Occa- 
sionally an opening occurs both in the throat and at the angle of the jaw, 
when the pouch is enormous, the amount of pus very great, and the ulcera- 
tion very considerable. If both sides are affected, the breathing may be 
difficult, and suffocation threatened. Should the horse in addition rear up, 
and have a thick, gummy coat, glanders may be reasonably suspected. 
In addition to the remedies hereafter named, it is very useful to turn 
the horse loose and let him feed from the ground or floor. Indeed, in 
some mild cases cures have been effected by allowing the horse to go into 
the yard or field where his head is nearly always hanging down. In this 
way the pus naturally falls through the nostrils, while the nose very often 
remains dry if the same horse is tied to the rack. An injection of iodine 
twice a day should be given by a skillful practitioner, and the same medi- 
cine administered internally. It may be necessary to perform an operation 
for the removal of the pus and the washing out of the pouch with a lotion 
of hydrastis or iodine; the operation can be done only by a practitioner, 
(4). ABSCESS OF A DISEASED BONE. 
After severe catarrh, especially in colts, an abscess may occur on the 
bone in one side of the head. 
Symptoms.—The symptoms are swelling and inflammation of the 
nasal membrane; difficult breathing, often causing a suspicion of polypus; 
the nasal discharge is variable, occurs when the head 1s raised, and may be 
preceded by a strangling cough. An operation by a surgeon may ke needed. 
(5). CARIES OF THE BONES OF THE FACE. 
A nasal discharge sometimes follows an organic disease of the nasal or 
upper maxillary bones, or of those on the side of the head; or it may be 
caused by the presence of foreign matter in the nasal chamber, or by a pro- 
jecting tooth, perhaps carous. 
Symptoms.—The symptoms of this disorder are a flow of matter only 
from the affected side, very offensive, often tinged with blood and mingled 
with particles of dead bone; the lymphatic glands are swollen but do not 
adhere to the bone. The foreign substance, the tooth causing the trouble, 
or the diseased bone, must be removed. 
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