148 
EXTRACTS FROM ENGLISH PAPERS. 
Case II.—At hard work, and receiving same quality and 
amount of corn as for several years. 
Case III.—Not working much, and not getting much 
corn, but on morning in question got a large feed of corn on 
account of the journey she was expected to make. 
I should like to ask if the feeding was quite sufficient to 
cause the disease, and whether it is anything more than a 
coincidence that all the cases were in mares , also whether 
there is any reason why they should be more susceptible than 
horses. Neither of the first or second cases were at the pe¬ 
riod of oestrum.— Ibid. 
LARYNGEAL AND TRACHEAL STENOSIS, AS THE RESULT OF 
OSSIFYING CHONDRITIS, IN A MARE. 
By Principal Thomas Wallet. 
This is a case of a mare which had been for a period of 
two years under the personal supervision of a veterinarian, 
and which when seen first was apparently in good health and 
excellent condition. She had no cough, nor did she roar ex¬ 
cept when trotted fast, and that increased until suffocation 
was threatened. She was tracheotomized, and worked well 
for a period of twelve months, when the lumen of the trachea 
became so small that she had to be operated again at a point 
lower down. She continued to work well, and retained her 
condition up to a short time before her death. 
The autopsy revealed almost complete stenosis of the 
larynx brought about by ossification and thickening of its 
cartilages, and at the seat of the operations of tracheotomy 
the adjunct cartilages were found greatly hypertrophied and 
in advanced stage of ossification. Two large indurated gran¬ 
ulations had formed in the mucous membrane around the 
tracheal apertures, and in the case of the lower one the skin 
had crept over the edges of the wound to such an extent as 
to infringe upon the interior of the trachea itself.— Jour, of 
Comp. Pathol. 
