( 5oo8 ) 
more eafily to receive the ckarader of the 
Blood in the Heart ; But that this might 
be more conveniently done, the DhcIhs 
ThoracicHs being inferted into that trunck 
ot the Vena cava which afcends to the 
Heart, becaufe that this way is fliorter, 
and is equaUy favourable to this corn- 
mixture. > UX^'t?*,^; . 
It nnght alfo be objeci:ed,that,fuppofing 
this commixture were of importance, the 
Dt4Bj44 Thoracicus fliould communicate 
with the inferior trunck of the vena cava as 
well as with the fuferior ^to the eiid that the 
moiety of the Ghyle being mixt with the 
blood that comes from on high, and the 
other moiety with the blood that comes 
from beneath, (B) it might the more ea- 
fily be altered by this commixture. And 
this Objedion feemed the more rational, 
becaufe , it being very likely that the 
Blood, which returns from the parts in 
which it hath received fome impreflion 
in penetrating their porofities , commu- 
nicates to the Chyle thefe fame difpofiti- 
ons • there was.reafon to defire, that the 
Blood which re-afccuds might in fome de- 
gree imprefs the peculiar charader of the 
inferior parts, as that, which comes from 
the upper parts, impreffes upon it that 
which belongs to it. 
(C.) Add hereunto, that the Blood 
which re-afcends to the Heart, muft be 
more perfed than that which defcends ^ 
becaufe it. comes from being purified in 
the Liver, Spleen, and Kidneys^ fo that 
it is capable to give {D.) to the Chyle 
good impreffions. 
{£,) Laftly, it might be faid, that, fup- 
poi^ing it be neceffary chat not only a por- 
tion of the Chyle pafs through the Heart, 
to give it fome kind of refrelhment,but 
alfo thit all the Chyle be conveyed thi- 
ther for to be converted into Blood ^ 
the fmall orifices, which thz duSius tbora-. 
cicHs hath in the fubckvlals, i feedi not to\ 
commlxtHre of Blood and 
Chyle fufficient. The re- 
inforcement $f that obje- 
ction anfwers it felf^ hing 
fropofed in no other terms 
than ( it feems very like- 
ly j ^ the rphole conjecture 
having yet had hm very 
fender foundation in Philofe- 
phy. And if there be any 
thing in the notion ofimpref' 
fing charaElers , it is more 
attributable to the lympha. 
See beneath lit, D. 
(C.) ThAt the Blood, 
yfhich re-afcends- to the 
Hearty is purer than what 
defcends fr^m the He^d^Scc, 
is a notion that will not ea- 
fily be granted, neither can 
it be made out by Experi- 
ment, I have my f elf com- 
pared the Blood of the J ugH^ 
lar vein with that of the 
Crural in a Dogg , and 
found no difference. The 
feparations made by the Kid. 
Keys and Liver (if they 
prove any thing) prove the 
afcending blood to be thicker 
than the de[cending it ha- 
ving loft in thofe places much 
of its ferum and its iixivL 
al falts , which are the great 
inftruments of attenuation. 
But with all it is to be cotp* 
fidered , that the Blood , 
which afcends from theHeart 
to the Head mparts with much 
excrement in glandulac 
f a 1 i V a 1 e s , and noflrils, and 
the whole throat the quan» 
titles of which are mpich 
greater than will eafily be 
imf^ined* \ , There « HkS' 
be 
