[ 3 6 7 ] 
difcafe as uncertain ; on which account it was left to 
take its own courfe. The event was, the tumor 
burft in three weeks after his admittance, difcharged 
a confiderable quantity of matter, and the patient 
did well. 
From what has been above advanced it is plain, 
if thefe arguments can be fupported by fadts, that 
the laying down fuch rules for infallibly diftinguifh- 
ing aneurifmal tumors from tumor9 proceeding from 
very different caufes, muft be a matter of the greateft 
difficulty : and, as a further proof of their uncer- 
tainty, I take the liberty of offering the following 
fhort hiffory of a remarkable cafe, which has lately 
occurred in my own experience. 
In the month of December 17 y 6. John Yates,, 
aged 3 5 years, received an hurt upon and about his 
knee, by falling upon the ground from a man’s 
back. The accident was immediately followed with 
a confiderable degree of lamenefs and pain ; which 
upon Handing or walking were greatly increafed. 
He continued in much the lame Hate for about 
fix weeks after the accident. At the end of this 
time, the calf or the leg was attacked with an cede- 
raatous or doughy fwelling ; which, in a fortnight,, 
became fo painful, as to difable him from walking. 
The tumor continued to increafe for about eight 
weeks ; and at length extended itfelf fo far upwards, 
as to affedl the greateft part of the thigh, the whole 
of which was attended with exceffive pain, but 
more particularly fo about the knee. 
N. B. So far I relate from the patient’s own ac- 
count. 
On 
