ON WHITE TUMOURS OF THE JOINTS. 
507 
CASE I. 
On the 15th of May, 1832, a sorrel-coloured mare, about seven 
years old, and of a lymphatic temperament, was brought to me : 
she had on the right knee a white tumour, complicated with 
caries of the bones. The disease had existed for several months ; 
several cold abscesses were formed in the tumour : they were 
opened; a purulent flaky pus escaped, which carried with it little 
splinters of bone that came from the carpus. 
These abscesses were opened three times; in spite of which 
the tumefaction, the softening, and the caries still continued, 
with considerable enlargement of the soft parts. I did not con¬ 
ceal from the proprietor the unfavourable state of the animal, 
and that I regarded the disease as beyond the reach of medical 
art. He would not have her destroyed, and persisted in con¬ 
tinuing the treatment. I was obliged to make some large inci¬ 
sions and counter-openings, and to lay the bone bare, in order to 
get rid of the purulent matter. I afterwards covered the wounds 
with tow, soaked sometimes with emollient liquids, and some¬ 
times with styptics. 
The 2d of June: the disease still continues, but is not so 
serious. 
The 27th.—The swelling has passed into a state of induration. 
There are two fistulas formed ; one on the posterior and external, 
and the other on the internal part of the knee. On probing 
them, they reached to the bones, which were evidently carious; 
and a greyish coloured pus was discharged, sometimes min¬ 
gled with small pieces of bony matter. She appeared to suf¬ 
fer very little pain. I once more advised the owner of the mare 
to have her destroyed, but he persisted in his refusal. 
On the 4th of July, her food was diminished one-half; the 
diseased part was covered with emollient poultices; and a little 
blood was taken from the radial vein. 
On the 6th, the suppuration was not so abundant, and a slight 
softening of the part was observable. 
On the 12th, she was bled again, and the emollient poultices 
were continued. 
On the 23d, there remained but a very slight enlargement, 
and no suppuration; the fistula on the inside was entirely cica¬ 
trized, but that on the outside still remained open. I ordered it 
to be injected twice a-day with aromatic wine and sulphate of 
zinc. The suppuration gradually diminished, and the fistula 
healed. It was alternately rubbed with iodine ointment, and 
syringed with cold water. During the last fortnight of August 
