PHYSICAL AND LITERARY. 257 



to the upper end of the cyft, and conti- 

 nued again from, its loWer end, with an 

 apparent continuation of the coats of the 

 artery with thofe of the cyft, and per- 

 formed the cure in the fame way as if it 

 had been one of the falfe incyfted aneu- 

 rifms. 



An erofion, or deftru(5lion of any of 

 the coats of an artery, by pus or acrid 

 matter of any kind, or fuch an obftruc- 

 tion or relaxation of any of the coats of 

 an artery, as to render them incapable 

 of refifting the force of the blood, may 

 likewife give rife to fuch aneurifms. 



III. These two fpeci^s of true an^ii- 

 fifms may be complicated together j for,- 

 after an artery has been ftretched to a 

 certain lengthy fome of its coats may giv^ 

 way, and the others which remain entire 

 be dilated into a cyft. I once faw, with 

 Dr Hunter, an aneurifm of the aorta, of 

 a man who had been a patient at our 

 hofpital, but had gone out of the houfe 

 before he died, which had this appear- 

 ance ; the aorta was diftended to feveral 

 Vol. in. Kk times 



