292 Observations upon the 
into a cavity filled with a smooth fluid as 
above ; as the process goes on, the uncovered 
asperities of the fracture are taken up by the 
absorbents, and moderately adapted to each 
other; they become partially covered with 
cartilage, and the glairy fluid serves all the 
purposes of synovia, lubricating and render- 
ing motion of the new joint as easy as possible. 
In the first volume of the Transactions of a — 
Society for the improvement of Medical and 
Chirurgical Knowledge, is a case by Mr. 
Home, with an engraving so very much to 
the point, that I hope the quotation will be 
excused, since it shews the completion of the 
process here spoken of, and of which Exp. 13. 
14 and 15, may be considered only an earlier 
stage. “ A man aged sixty-eight, died in 
“« St. George’s Hospital, whose right.os hu- 
«* meri had been broken three years and nine . 
‘© months before, but the bones had continued 
disunited, and admitted of motion more 
* freely at that time than immediately after 
«* the accident.—The arm was carefully dis- 
*« sected, to examine the state of the frac- 
tured part, between which there was no 
“* callous, but a large bag filled with a glairy 
fluid resembling synovia. The internal 
surface of this bag was smooth, resembling 
a capsular ligament, and its attachment to 
