a 
Callous Tumour. 289 
Of deficient effusion from the internal 
membrane. 
Exp. 13. One hundred and twenty hours 
after fracture—The injured part was sur- 
rounded and enveloped in a firm tumour, re- 
sembling the intervertebrary substance, but 
rather darker; the tumour adhered to the 
surrounding soft parts, which were very vas- 
cular ; and so intimate was its connection with 
the external membrane, that they were not 
distinguishable from each other. Upon cut- 
ting into the tumour, a small cavity was ex-- 
posed, containing 2 slippery glairy fluid; 
into this cavity the point of the superior por- 
tion of bone slightly projected, having a small 
part of the fractured face uncapped and bare. 
The inferior portion of the fracture was in a 
natural state, capped and embedded in the 
tumour, and not communicating with the ca- 
vity above mentioned. 
Exp. 14. One hundred and forty-four hours 
after fracture.—The adhesion of the integu- 
ments to the parts beneath, was unusually 
firm, when these were removed there appear- 
ed an increased vascularity of the soft parts, 
with a firm tumour encircling the injury, not 
Vou, Ul. 00 
