286 Observations upon the 
external membrane, or in other words, there 
was no callous thrown out by the injured 
parts; the fracture lay loose and unconnected 
in a mass of disease ; the lower portion of 
bone was denuded of its external periosteum 
near the point of fracture ; a slight effusion 
from the inner membrane lay loose upon each 
fractured face, upon pulling which, the mem- 
brane came away, leaving the canal of the 
bone denuded. 
Exp. 11. One hundred and sixty hours af- 
ter fracture.—The superior part of the bone 
protruded through the skin, denuded of its 
outer covering ; the soft parts in its neigh- 
bourhood were much diseased. The inferior 
portion of bone was in amore healthy state ; 
it was capped with an effusion from the inner 
membrane ; the outer membrane was inflam- 
ed and thickened, and had thrown a little 
effusion into its immediate neighbourhood, 
the limb was cedematose. + 
Exe. 12. One hundred and eighty-four 
hours after fracture.—Both portions of bone 
were denuded of outer covering near the point 
of fracture; above the denudation, the mem- 
brane was inflamed and thickened, but no 
effusion of coagulable lymph was thrown out 
around the injury. A slight effusion from 
the inner membrane lay loose over each frae- 
