PROSPERO. 
161 
this last operation, which consisted in the removal of three molars, 
two of which were much diseased. 
I received a few days ago a letter from Dr. Gadsden, of 
Philadelphia, telling of his surprise at my diagnosis of big head 
—an erroneous impression which he received from Dr. Miller and 
the reports in Turf, Field and Farm. 
On the day of my visit, the animal presented the following 
conditions: Prospero was in a box stall, as comfortable as possi¬ 
ble ; his face, on the right side, presented a large swelling, some¬ 
what diffused, yielding to pressure, involving the superior max¬ 
illary bone, extending upwards to the lacrymal and zygomatic. 
The skin showed large veins running underneath and had two open¬ 
ings where the trephining w*as performed, from which a bloody, 
serious and very offensive discharge was running. The finger, 
introduced through the wound by Dr. Miller, penetrated into the 
sinuses, and when withdrawn was loaded with the peculiar odor so 
characteristic of necrosed bone. On examination of the mouth 
with a speculum, a large fungoid granulation was visible, protruding 
between the molars at the place of the extracted tooth. The pos¬ 
terior molars were diseased. The palatine plate of the maxillary 
and the alveolar cavities were more or less exposed, and the fingers 
which touched them carried with them the peculiar odor already 
mentioned. There was a discharge from the right nostril, of the 
same character as that of the wounds of the face. Dr. Miller 
had told me of his operation ; quite a severe hemorrhage had 
accompanied it, and if my memory serves me, stated that from 
the moment he opened the sinuses he thought he had something 
more than a secretion of pus in those cavities. 
In the presenee of these symptoms, I made a diagnosis of 
osteo sarcomatous degeneration of the face, brought on by carious 
teeth, and probably stimulated by the improper extraction of the 
healthy molar. I made my diagnosis known to Dr. Miller, who 
stated that he thought so from the moment he had operated, as 
he had felt it to be like what he had commonly met with in cows. 
I repeated this diagnosis to Dr. Zuill, whom we met as I was re¬ 
turning to the railroad depot. I also stated it to the students of 
the American Yeterinary College, on my return to Hew York, 
