Page 129

of a BARBARY COW.
  Tile Liver was round and without Lobes, being only a little cleft before
and behind. In the Trunk of the Vena Porta there was obferved little Mem-
branes in form of Valves, which half covered the holes of the branches
which do carry the blood from ttle Trunck of the Porta into the Subiftance
of the Liver, to hinder it from returnirig into the Trunck. Thefe Valves
which have not been yet fzen in the Liver of any Animal, are very favoura-
ble to the Pulfation, which GliJfon attributes to the branches which the
Porta
cat1l into the Liver: for this pulfation, which he thinks to be communicated
to them by the Arteries, which are joyned and fallened to them by the aRfi-
fiance of a Capfitla,'which inclotes the Vein with the Arterv: this Capfula
ha-
ving a particular motion of conftriaion, is not eafie to conceive without
thefe
Valves; it being hard for the blood lock'd up in theta Veins to form any
pulfation when it is ftruck by the dilatation of the neighbouring Arteries,
if
not inclofed and retained by lhme adjoyning obftacle, fuch as is that of
the
Valves; otherwife it will neceffarily flow back into the Trunck, and Branches
which do convey the blood thither: for the impetuosity of the motion of
this blood towards the trunck cannot fupply this obftacle, as Glidfes pretends,
by reafon of the weaknefs of the Tunicle of the Veins, which do bring this
blood into the Trunck: for thefe Veins would have more need of a Cap//la
to be ffrengtlhned, than the branches which are in the Liver, the Parenichyyma
whereof might be fufficient to ftrengthen them. So that it feems that for
want of thefe Valves, the beating would be much greater in the Branches
which do convey the Blood into the Trunck of the Vena ptart, than in thiofe
which do diftribute it into the Subftance of the Liver: and that this beating
mutt be as contrary to the motion of the blood contained in thefe branches,
as advantagious to that which muft be diftributed in the Liver.
  The Gagll-bladder was at the extremity and on the edge of the hollow part
on the right fide. It was fafined to the Liver by its internal half, and
the
Membrane which made the outward half was thin, fine, and all folded, be-
ing intirely void of Gall.
  The Lungs had feven Lobes: the five upper ones were fmall; the two lower
contained nine inches in length and five in breadth. They were fafined to
each other towards the middle by a MembranousLigament half an inch broad,
and two thirds of an inch long.
  The Rings of the A/pera Arteria which were imteprfe2l, did leave the fMace
of a fingers breadth without a Cartilage at the place towards th, Back-bone,
and which touches the Oefophagus. Thefe Rings were of fuch a Figure, and
fo difpofed, that their extremities flatned, and inlarged, did each form
as it
were two Wings or Auricles, which were laid one upon the other; fo that
for inliance the lower Wings or Auricles of the firf Cartilage were covered
with the upper Wings of the fecond, which with its lower wings did like-
wife cover the upper wings of the third, which did cover its lower wings
with the upper ones of the fourth. This continued after the fame manner
in all the Cartilages of the Afpera Arteria, as is reprefented in the Figure,
which alone can fufficiently demonfirate this extraordinary Struaure. The
refidue of every Ring, which was the hardeft part, was hollow in its middle,
and left two eminencies at its fides. This conformation did in this place
make the Afpera Arters muore rough than it generally is; becaufe that the
in-
                                          R                      equality
I n9