93 NASAL GLEET. 
being placed upon the ground. Stench and discharge, often coming 
only from one nostril, but occasionally from two, are likewise sympto- 
matic of the same disorder. 
Pus is, naturally, the blandest secretion of the body; but being con- 
fined, it corrupts, and then smells abominably. The blow, which started 
up the secretion, injured the bones forming facial sinuses. Those cavities 
open to the nostril on either side by two comparatively small flaps, slits, 
or valves. These are their only means of communication with the ex- 
ternal atmosphere; and through these valves all the pus must flow. Is 
it surprising if such structures occasionally become clogged, till the 
accumulated secretion, or the increased breathing, or the position of the 
head, obliges the passage to give way? 
The chances likely to result upon treatment are about equal, but the 
process is generally slow. The trephine has to be employed upon the 
facial sinus, and circular portions of bone have to be removed. Into 
the openings thus made is to be injected, by means of a pint pewter 
syringe, half a gallon of tepid water, or water heated to ninety-six de- 
grees, in which half a drachm of chloride of zine is dissolved. The 
chloride of zinc not only destroys the fetor, but also disposes the mem- 
brane to take on a new action. 
The injection, however, only cleanses the sinuses, and the nose also 
becomes involved by the disease. It is usual to describe the turbinated 
bones, or the fragile bones situated within the nostrils, as thin osseous 
THE TREPHINE, BY MEANS OF INJECTING THE HEAD OF A HORSE FOR NASAL GLEET. 
WHICH A CIRCULAR PIECE OF 
BONE MAY BE REMOVED. Copied from a work by La Fosse. 
structures, making numerous convolutions upon themselves. They favor 
such an opinion when viewed in sttw; but, being removed, are found to 
consist of ample sacs or bags, which the external layer concealed from 
view. These hidden spaces soon fill with pus; here it remains; the 
