242 
J. P. ADAMS. 
tible ; the pulse is weak and of the same nature as above ; the 
respiratory murmur is very strong. 
■ Diagnosis. —What shall be the diagnosis ? Proceeding by 
way of elimination, I can say that it is not a disease of the heart, 
nor of the lungs, nor of the brain, and I formulate my opinion as 
being : A thrombus into either the carotid aideries^ or thepignlar 
veins^ or the pulmonary arteries or pulmonary veins. 
Prognosis fatal, and owner is advised to have the animal 
destroyed. 
Autopsy. —The autopsy is made immediately after death. 
Nothing special is noticed into the digestive and urinary organs. 
All the valves seem normal except the aortic. Heart hypertro¬ 
phied a little; the semi-lunar valves of the aorta are thickened. 
When the aorta was laid bare and examined the cause of the 
symptoms present during life was easily discovered. It gave to 
the touch the sensation of being filled by a thrombus for a length 
of about 18 inches, starting from the ventricle. When laid 
opened the coat was found considerably thickened, reducing the 
inside diameter of the blood vessel to about one quarter-of what 
it is normally. 
The mare was suffering from arterio-sclej'ose of aorta. The 
consequences are easily understood : When the animal was at 
estr the circulation was sufficient and nothing abnormal could be 
detected. When the animal was exercised the small diameter of 
the aorta acted as an obstacle to the circulation, the pulmonary 
vessels became gorged, dyspnoea rapidly became suffocating, and 
the animal had what was called an attack of staggers. 
THE VETERINARIAN AND THE HORSE-SHOER. 
By J. P. Adams, Glenville P. O., Cleveland, Ohio, President Ohio State 
Association Master Horse-Shoers, President Cleveland Local No. 
5 , Second Vice-President National Horse-Shoers’ Protective Associa¬ 
tion. 
An Address delivered before the Ohio State Veterinary Medical Association 
When I accepted an invitation from your worthy President, 
Dr. E. H. Shepard, to prepare and read a paper before this hon- 
