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OBSERVATIONS 
THE CALLOUS TUMOUR. 
MR. KINDER WOOD. 
(Read Dec. 12th, 1817.) 
cee ll 
———— 
I HAVE been induced to make some dissec- 
tions, and to enquire into the subject of the 
present paper, in consequence of the various 
accounts given by authors of the origin of 
that effusion succeeding to fracture of a 
bone, termed callous. How far the subject 
will receive illustration, I will not presume 
to determine; the enquiry was originally 
made for the purpose of clearing up my pri- 
vate opinions, and having no partieular theory 
to support, I have only been solicitous: to 
draw plain inferences from the facts. 
Of the appearances found immediately after 
. the fracture of a bone. 
Exp. 1. I took a young rabbit and frac- 
tured the bone of thethigh; in six hours af- 
terwards the animal was killed, and the in- 
