others, is made very evident. ( Seethe Preparation in 
the Repofitory of i\\Q]Ro)al Society.^ 
The Difleftions of Morbid Bodies not only inftruft us 
in the Seats and Caufesof Difeafes, but very often inform 
us in the true life of parts, as will appear by the following 
Inftances. 
The Offificaiion or Petrification in the Great Artery, at 
its rife frorn the Heart, has been fo commonly found, that , 
fome think it isconftant 5 how it may be in fome Animals 
I cannot be certain, but in Humane Bodies I am well afla 
red whenever it happens it is a Difcafe, and dees in fome 
meafure incommode thole parts in the due execution of 
their office^ as the following Cafes will evidence : But 
that this Paper may be of fome ufe^ I (hall fet down the 
Symptoms before Death, which may help our Conjeftures 
when the like offers again. A fpare man about 90, who 
languilht with an Ulcer in the Thigh, attended with a 
Caries^ or Rottennefs of that Bone at its Articulation 
with the Tihid and Vatella call'd the Knee, where all 
thofe Bones were afFefted, at length fell into a true 
Phthifis^ and coughed up no fmali quantity of Pus 5 fome 
months before his Death I frequently faw him, when he 
would often offer me his Wrift, to feel his unequal Pplfe, 
which was wont to amufe him 5 the Artery there miffing 
fometiraes one, fotnetimes two ftrokes in 6 or 7 ; At firft 
he told me he obferved itmift but one in ten biit at length 
thofe ftops became more frequent, efpecially on any agi- 
tation of the Body or Mind : t\\o ^PolypHs in any of the 
Great Veffels about the Heart may induce that Symptom, 
yet the continuance of it fo long before Death, fhev/s it 
owing to fome other Caufe, as appear'd on opening the 
Heart and Great Artery of this perfon. AAADGc 
Fig-ift. 
You will not be furprized 1 fend the Figures printed 
from Copper Plates, when I tell you they are defigned, 
among others (lam now about) to explain the Mufcles, 
Bbbbbbbbbbbb 2 in 
