276 
EXTRACTS FROM EXCHANGES. 
iodine (double strength) ; the first four are sufficient for super¬ 
ficial and the others are principally indicated for deep wounds. 
Those agents protect the wound against infection in preventing 
absorption and in acting more or less on the virus. The diffi¬ 
culty of success varies with the depth of the wound ; altogether 
superficial ones become infected oftener, but they are more 
easily preserved. At any rate, nitric acid, nitrate of silver and 
double tincture of iodine, must be preferred under all circum¬ 
stances as acting more thoroughly and more surely. {^Joufu. 
de Zootechd) 
A Case of Tracheal Difformation (Flattening) in a 
Mule \^By Mr. A. Plemdoiix \.—Eight years of age, and of 
large size, this animal was a confirmed roarer. Six months 
pr^iously the symptoms were very mild, but little by little 
they increased in severity and now he roars in walking, and il 
put to work or to trot, he is threatened with asphyxia. Sup¬ 
posing that possibly the condition was due to the lesion most 
ordinarily met with, viz., paralysis of the larynx, laryngotomy 
was decided upon and performed ; but after release from the 
operating table and, though he had the ordinary^ temporar} 
tracheotomy tube, the mule continued to roar. Taking out this 
tube and exploring the trachea downwards, the author found 
that the diameter of the organ was gradually diminishing in 
size. The mule, growing rapidly worse with this difficulty of 
respiration, was killed a few days after. At the post-mortem the 
trachea was found fiattened from forward backwards in its 
lower half. The cartilages were very flexible, and, instead of 
overlapping each other, their extremities were separated from 
each other from four to five centimeters. The antero-posterior 
diameter was scarcely 15 millimeters, the transversal 6 centi¬ 
meters. The interannular ligaments were torn and the mus¬ 
cular coat of the trachea, loose from the inner face of the rings, 
and forming folds in the cavity of the trachea, reduced its 
calibre.— {^Joiirn. de Zobtech.^ 
Sudden Death by Subarachnoid Hemorrhage of a 
Stallion During Copulation, Suffering with Tricuspid 
Insufficiency. —In the Revite Vbterinaire., Mr. Scoffie relates 
this case of the death of a seventeen-year-old stallion which oc¬ 
curred during copulation, and at the post-mortem, besides hy¬ 
pertrophy of the heart and disease of the tricuspid valve, a 
haemorrhage was found on the superior face of the posterior part 
of the bulb. On dividing the dura mater, a clot was found back 
of the calamus scriptorius, between the visceral layer of the 
