i^z ESSAYS AND OBSERVATIONS 



" intermixed with the mufcular fibres^ 

 " The cellular fubftance lining the infide 

 " of the mufcular coat, was confiderably 

 *' thicker than natural, and had much 

 " the fame appearance of an extraneous 

 " fubftance filling its cells. The inter- 

 *' nal membrane of the artery adhered fo 

 " firmly to thefe cells, that it could not be 

 *' feparated, but feemed thicker than in a 

 " found ftate. Though the circular fibres- 

 " could be obferved at the fides of the in- 

 " cifion made into the forepart of the 

 " fac of the left ham, as reprefented iri 

 " your figure ; yet, as the diffecflion was 

 " continued backwards towards the mofl 

 ** diftended part, thefe miufcular fibres 

 " became lefs obfervable, and could not 

 *' be traced. Whether this apparent de - 

 " fedt of them here was owing to a much 

 " greater proportion of the extraneous 

 " fubftance above mentioned, or to their 

 " having been deftroyed by thcgreatdiften- 

 " fion, is difficult to determine. The in- 

 " ternal cellular coat of this fac was con- 

 " fiderably thicker than in the fmaller 



" ones. 



