PHYSICAL AND LXTERART. Z5^ 



^•ifms, and experiments nxade with th(?. 

 blood on bones*, are all repugnant to 

 this opinion of the blood's beirxg capably 

 of diflblving and rendering the bones, ca.- 



rious. 



■ The fides of aneurifmal facs. bav^ 

 been found in very different dates. Ii> 

 %he aorta, they have been found moftly 



firm 5 



obf, 18. An obfervatioQ of Mr Sharp's, (Surgery, 

 chap. 36.). of the dilated aorta ia the neighbourhood 

 of the cyft being generally offified. and ot offitications 

 and indurations of the artery appearing fo condanlly 

 in the beginning of aneurifms of the aorta, that it is 

 not eafy to judge, whether they be the caufe or the et^ 

 fefls of them, is juft. 



■ It may be worth while here to obferve, that, in the 

 two firft cafes of aneurifms I related above, there was no 

 offification ; which fhews, at leaft, that aneurifms nvajc 

 arife from other caufe?, if it does not make It probable, 

 that offincations are rather the confequences than the 

 caufes of fuch diforders. 



* Dr Pringle told me, that he digefted bones in 

 putrid blood, but did not find that the blood had the 

 kaft effea in diffolving them as a menftruum. The 

 hream of blood indeed, by perpetually wafhing the ca- 

 ries of bones laid bare by aneurifms, prevents the oily 

 matter feparated from the bones from Ragnatlng and 

 acquiring the ftrong foetid fmell, and high degree o| 

 corruption, obfeived \n other caries. 



