880 
CARL W. GAY. 
region of the withers, showing most extensively on the right 
side. On the left side the swelling was about the size of a man’s 
fist. The two were apparently communicating. Upon aspirat¬ 
ing the right with a trochar and canula, large lumps of coagu¬ 
lated lymph, together with clear serum, were drawn off. The 
treatment at first was to evacuate by means of trochar and ca¬ 
nula, injecting tincture iodine into the abscess cavity, but this 
was finally abandoned and free incision of both sides of the 
withers resorted to. Tubes of bouillon and agar were inocu¬ 
lated from the pus first aspirated, but they remained sterile. A 
streptococcus and a white micrococcus were isolated from cul¬ 
tures made from the discharge after operation. 
Case IV .—Clinic No. 2246, Feb. 5, 1900. Patient a brown 
horse, weight about 950 lbs., 10 years old; was bitten on the 
withers last autumn. A swelling of the part soon followed, 
which persisted till the time the case was presented at the col¬ 
lege clinic. 
The region of the withers was very much swollen, more so 
on the right side than the left, fluctuating and tender. Right 
side was punctured with a trochar and canula, and a large 
amount of coagulated lymph drawn off. Ten days later the 
right side was incised and the abscess found extending across to 
the left side, which was also freely opened in two places. 
Tubes of bouillon and agar inoculated from the material 
aspirated when the abscess was first opened were not sterile in 
this case, but there were isolated from them a streptococcus, a 
white micrococcus and a yellow micrococcus. These same or¬ 
ganisms were also isolated from cultures of the pus made after 
the abscess had been opened and suppurated freely. 
Case V .—Clinic No. 2253, Feb. 9, 1900. Patient was a 
brown mare, 8 years old, weight 1050 lbs., used for general 
farm work. She was a half sister to the brown horse entered 
as clinic case 1958, poll-evil, Case VIII. These two animals 
worked together and were stabled together, but each had its 
own harness, and these were never interchanged. The swelling 
of the mare’s withers was first noticed August 1, before the 
horse’s poll was seen to be affected, but the swelling remained 
hard and did not seem tender. About three weeks before com¬ 
ing to the college clinic the swelling began to soften. The 
owner had had an old mare that had a swelling about the size 
of a goose egg on the neck, just back of the poll, but she was 
killed without any investigation as to the nature of the trouble 
being made. When the first mentioned brown mare was seen 
