HIE A/RY 
tremities of the — Tn the following tabular view of 
thefe experiments, the figures of the firit column fhew the 
meafurement of the artery in its contracted flate; thofe ” 
the fecond, the meafure at ‘the pomt of greatelt contraction 
of the third, in the ftat recovery ; and in the Fouts, 
_the degree of cotiteabdion’ in ~ of the whole artery. 
Inches.! Inches oe. 
Aorta afcendens - She FBO, 6 ir 
Aorta defcendens at bi | 6 : 
the firft intercoftal 43 7r2 | 4rz LA 
Aorta defcendens at ee ve 1 
its loweit part i bs 
Tiac arter 2 i Zits $ 
Axillary - I 13 WG rs 
Carotid - - Pe 1 +2 $ 
CT ae: : +2 nap 2 I fz 3 
umeral - : xs ate Tr + 
Raiial. 3 . 3 mar 46, |The whole.: 
sthly. In longitudinal wounds of the arteries, the cut ends 
of the circular ~ er from each other, and leave a 
vacant — betwee 
Bichat ‘complains ait wii authors have confounded the 
property which we are now confidering, with ee 
He or NS «that in all the preceding cafes there is no ne- 
or applying any ftimulus to the sroeial tiffue ; the 
only: nae Lageiiice is the ceflation of the diftending 
foree, and this circumftance sapiens. eae eg ing the © 
contractility which refults from organiza It is more- 
over evident that this property is cahibited ater death, al- 
con- 
though lef sfenfibly than during life; where 
wary, every kind of invitability ceafes in a ico hours after 
the ceffation of life.” Mr. Hunter is one of thofe, to 
tiom the ne obfervations of Bichat are applicable. 
He {peaks | miliary of the —— coat and mu/culara&tion 
of arteries; as if thefe points — clearl afcertained ; 
and he eas the vada on the arteries of 
a horfe bled to death, which we “aha stint: above, to fhew 
= prea degrees of nrtfcularity poffeffed by different 
The “contraétility in the longitudinal direGtion is. lefs 
ftrongly marked than in the —— but it exits to a‘cer- 
tain when an? between two 
ligatures, the two'énds ave tetrattedi thio the cellular fheath, 
and become feparated by acertain interval. Thi retraétion 
occurs m amputation, but, as that of the fkin and mufcles 
is more confiderable, the artery remains fomewhat ee 
i tranfverfe wound of the arterial coats 
dead ft: 
farce to ‘tin the 
-The following i is the 
propertice.  Aniimal fenfibility 
setae of Bichat’s experience ge fubje&. The appliea- 
uote a ligature fometimes catfes pain, but miore frequently 
ble, than when 
has no fuch effet. In nimerous trials on the carotid, irre. 
tion by the knife, by acids or’alkalies, occafioned no figns 
. Dra ; and pease refults have been obtained by numerous 
This is a proof of the infenfibility of the nerves 
of ae organic life, which are diftributed wpon the arteries 
moft every part. ith refpeét to the internal mem. 
besa; the injection of a mild fluid, as of water at the tem. 
perature of the animal, is abfolutely indifferent ; he pi 
tating fubftances, fuch as ink, dilute acids, wine, &e. 
uce a very acute pain, if we may be allowed to fade Fie 
the cries and agitation of the animals when they enter the 
caroti 
Aniinal or voluntary contradility does not belong to the 
arteries. Irritation of the brain, which convulfes the yolun- 
tary ep and opium, which paralyfes them, ‘have no effect 
on thefe tubes. Irritation of the cerebral. nerves, or of thofe 
from the 
galvanifm. - 
on the riervous bowers tt an 
the teoftiienee of _ bai on the 
arteries, are vague, rape st ee and contrary to 
Properties of the Organic Life. — Organic Jnl contra 
is pane Hy abfent from the {yftem which we are now ii 
No irritation, either of the external or internal 
urface, produces any contra¢tion of an artery im the be 
nimal, It betrays no figns of contractility when rem 
re- 
nently cormigated A areinent of all bog can 
be faid on the oppotite fide of the quieftion,; : with 
oemmerring, de Cop. 
to corde) shes Ps nutrition 5 on as cs as the 7 
the heart on the blood’s motion ceafes, which i is roy 
fen 
exile with the preceding contraétility, and amounts my 
to an obfcure proportion in the runks, 
n the Caufes of - Motion of the red Blood.— Are the 
arteries a&ti paffive in this watiuets > When the ee 
examines the pulfe, a he difcover ‘ condition 
confequently, that the ftate of the pulfe, 7 an almoft all 
indicates the condi ion of the vital of ' net heart, and 
Sete aca eee 
excited when the eae oe are the mott “pete 
e fewett and moft feeb’ 
‘the pulfe were spredinced by vital cont 
teries, it thould bei lar below an 
St evel tiffs wooo 
fince the difeafed condition of 
paffage, but theehitn 
ing us from feeling t 
