OSTEO SARCOMA-SPINA VENTOSA. 
269 
bovine species are affected with it. I s !o doubt many of you have 
seen jaws of oxen which were thus diseased, and several beautiful 
specimens of it can be found in most collections of veterinary 
specimens. As I have been fortunate enough to observe what I 
consider four cases of osteo sarcoma (or spina ventosa) in the 
horse, I thought it might prove interesting to this Association to 
hear a few words respecting them. 
The first animal was seen by me some nineteen years ago. It 
was a handsome grey horse advanced in years, the pet of a family, 
who for several years had been more or less suffering with it. 
When shown to me he had on the right side of the face, covering 
the whole surface of the flat of the cheek, a large tumor of the 
size of a child’s head. Covered with the skin, which was healthy, 
this tumor was well defined, hard here and there, though giving 
a sensation of some softening when pressed at different places. It 
was not movable, had been there for several years without in¬ 
commoding him, and was even now apparently harmless, as the 
animal ate well, though slowly, and was even able to do his work 
as a family horse. My advice was to let him alone. But through 
the strong influence of others I was induced to assist in an attempt 
to operate upon the horse for the removal of the whole tumor. 
Dr. Busteed, whom most of you know, an able surgeon and excel¬ 
lent operator, was to perform the operation. Without giving you 
the minute details of the manipulations employed, I would say 
that from the moment the knife was applied to his jaw, the hem¬ 
orrhage was abundant. Cutting through the tissues without hes¬ 
itancy, and trying to isolate the tumor and reach healthy struc¬ 
ture, the doctor could scarcely see his way through the sheet of 
blood, which was running profusely, notwithstanding the rapid 
and strong attempts which were made to control it, the actual 
cautery even, being powerless before the hemorrhage. After 
nearly two hours of hard work, the operation was stopped, a por¬ 
tion only of the tumor being taken off, the animal having died 
from loss of blood. 
The second case I observed in a black horse used for hacking-, 
young, robust and ambitious, belonging to a livery-stable keeper 
in New York. He was passing before my office every day, and 
