C 4^0 
Allthefe Experiments let you fee an Animal may live 
fome time, tho* imperfedly wanting the Brain, and even 
the Cerebellum, but there is no Experiment Ui^iere e\ cr 
rhty lived wanting all ; therefore I humbly conceive, 
the Medulla Spinalis was not here wanting,for-ic has fup- 
p!ied the defeftof theBrain and Cfrf^f^^w^andlhe Animal 
Spirits have been feparated and diftributed for continu- 
ing the Circulation of the Blood : For it is to be confi- 
dercd, that altho* the Intercoftal Nerve and eighth pair 
have their Origine in the Medulla Ohlongata , yet after 
their entry into the Cavity of theBreafl, they are unit- 
ed with Branches from almoft all the vertebrsi Nerves, 
and with them makeup feveral Plexus's, and from thofe 
Plexus s, feveral Branches are emitted that go to the 
Heart and other Parts, fufBcient for continuing the cir- 
culation of the Blood, which has occafioned fome to run 
into a miftake, thinking the Circulation is to be explain- 
ed fome other way, then by the Influx of the Animal 
Spirits into the Nerves, which they endeavour to prove 
by an Experiment on a Dog, of tying the Intercoftal 
and eighth pair of Nerves, before they enter the Cavi- 
ty of theBreaft, and yet the Dog (hall live two or three 
Days thereafter. This Experiment they take for a fuf- 
ficient Demonftration, but except they can tie all the 
vertebral Nerves, or atleaft tic the Nerves at their en- 
trance into the Heart, their Experiment is not fo con- 
vincing ; but if in this cafe the Animal (hall be found 
to live any confiderable time thereafter, then the Circu- 
lation muft be explained fome other way : But the Symp- 
toms that ordinarily happen, even upon tying the In- 
tercoftal and eighth pair, is an evident Proof of the 
contrary, for the Animal is taken immediately with 
' Convulfions, 
There are a Million of difficulties ari(ing from this 
little Subjeia, obvious to every one that reads the Sto- 
