C 609 ) 
found(or thought) the operation more difficult,by reafon of fome 
jibres lying in the oppofite order (mentioned under the third par* 
ticular)and in this appearance lying uppermoft* 
Seventhly , in one of thefe attempts of unravelling the fibres of 
the inteftine of an Ox, fo inverted, I found, that though the fibre$ 
I took up came off in the order I jull now mentioned, yet run- 
ning over fome others , they made a more oblique excurfioo, and 
' for two or three convolutions left betwixt tfietii a confiderable 
area of fibres , amounting ("according to my conjeflure ) to five or 
fix times, or more, the bredth of thofe that fo came off, till going 
deeper and deeper among the other fibres , and at laft running un- 
. der them, they could be no longer traced, but brake off. Whether 
this be ufual, or only If^fffi mtur^^ I cannot determine. 
Eighthly^ I found it much more difficult ( in that one tryal I 
made) to unravel fibres oi the Ceecum^ than the other inteftine^ 
" which fcemed more inierwoven than thofe of the reft, and to have 
contrary tendencies one among another. 
This is the fum of my obfervations hitherto concerning this 
coat,which I take leave to think one concave andHelical mufclef if 
I may forty le it;) And ibat it might be fuppofed fiicb , the fore- 
mentioned infertions feem'd to evidence, they appearing to me in 
the feparating appofitely enough to reprefent the fabrickof a 
mufcle delivered by the accurate^ /^«r^?. Where the tendons of it are 
fixed, is not evident ; bur, if I may have the liberty to conjeflure, 
I ftould think the upper of them to be radicated ( at leaft ) at the 
pylorus (if not as high as the j}bin£ierguU ( if this be not itj) fince, 
the carnebuscoatof the ftomach being by the Learned Dr. Willh 
found to be a mufcular contexture , and there being a continua- 
tion of motion between that part and theinteftines, it feems to me 
not altogether improbable they may be but one mufcle ; and the 
either at the anus. 
Whether the fuppofed annular fibres of the veins and arteries may 
not have the famefabrick as thofe of the Intefiin^sfiuce both thefe 
kinds of veflTels feem to have a ferifiaitick concraftion of their 
own, and not to be bare conduit-pipes to tranfmit the impelled 
bloud, I propofe to be confidered and examined by perfons of 
more acute hands andjudgment;as Idoall what I have here delive- 
red , not daring too much to truft even the informations of my own 
hands and eyes, f ill I find them confirmed by thofe of others,more 
judicious as well as dextrous in making experiments. 
K k k k 2 Monfieur 
