A SINGULAR CASE OF DISEASE OF THE LUNGS. 507 
the foot continued to progress, and pus was issuing through the inner 
quarter at the coronet. The swelling above the fetlock continued 
to enlarge, and she is now beginning to refuse her food. I thinned 
the quarter, and removed the detached parts ; applied simple dress- 
ing, and renewed the poultice. 
4 thday . — The abscess at the fetlock was pointing, the heel slough- 
ing, and she discharged occasionally at the nostrils a quantity of 
greyish-coloured pus. I auscultated her, and detected a gurgling in 
the bronchial tubes. I then punctured the abscess above the fetlock 
with my lancet, and more than a pound of thick pus escaped. 
She was kept until the sixth day from my first visit. Seeing no 
possibility of the mare’s recovery, she was led to the stack-yard 
and destroyed. 
Post-mortem examination . — Both right and left lungs were 
filled with tubercles of various sizes, some of which contained a 
quantity of calcareous matter, while others were in a state of sup- 
puration. The pus varied in consistence in the different tubercles. 
On cutting into the bronchial tubes, they were found filled with a 
purulent fluid. The heart and pericardium were healthy, as were 
the pleurse. There were several tubercles in the messentery ; but 
with this exception the contents of the abdominal cavity presented 
a healthy appearance. 
The inguinal glands on the same side as the affected foot were 
in a suppurating state ; the sensitive frog, and the greater part of 
the elastic substance that forms the heel, had become quite a soft 
decomposed mass; and a separation of the horny from the sensitive 
laminse had taken place to a great extent around the outer quarter. 
Remarks . — This was an aged mare, and had been subject for 
several years past to a chronic dry cough ; but always carried 
plenty of flesh, and was in good plight when she was attacked with 
this lameness. Until the fourth day of my visits there were no 
symptoms to lead me to suspect any increase of disease in the 
respiratory organs. 
Although there can be no doubt that the tubercles had passed 
into the stage of suppuration before 1 was sent for to examine the 
foot, I am inclined to think that this destructive disease in the foot 
was connected with that of the lungs ; for there are many cases on 
record in which tuberculization of the lungs had proceeded to the 
last stage without even their presence being suspected by the 
medical attendant, until some accidental circumstance, such as the 
formation of pus in different parts of the body (as in the foregoing 
instance), induced them to examine the subject attentively with 
a view of ascertaining whether they depended upon disease of any 
of the internal organs ; for it is well known that pus may be con- 
veyed through the system by the circulation, and deposited in 
certain parts, acting as nuclei for the formation of abscesses. 
