the Blood and Animal
Spirits, of a somewhat _Acid_ taste, and to carry the same into the Gut,
call'd _Duodenum_, to be there mixt with the Aliment, that has been in some
degree already fermented in the Stomack, for a further fermentation, to be
produced by the conflux of the said acid _Pancreatick_ juyce and some
_Bilious_ matter, abounding with volatile Salt, causing an Effervescence;
which done, that juyce is, together with the purer part of the nourishment,
carried into the _Milkie_ veins, thence into the _common receptacle_ of the
_Chyle_ and _Lymphatick liquor_, and so through the _ductus Thoracicus_
into the right Ventricle of the Heart.

This Assertion, first advanced (saith the _Author_) partly by _Gothofredus
Mobius_, partly by _Franciscus de le Boe Sylvius_, he undertakes to prove
by experiments; which, indeed, he has with much industry, tried upon
several Animals, to the end that he might collect some of this juyce of the
_Pancreas_ for a taste: which having at last obtained, and found it
somewhat _acid_, he thereupon proceeds to deliver his opinion both of the
_constitution_ and quantity of this _Succus_ in _healthy_ Animals, and the
vices thereof, in the _unhealthy_: deriving most diseases _partly_ from its
too great Acidity, or from its saltness, or harshness; _partly_ from its
paucity or redundancy: but especially, endeavouring to reduce from thence,
as all _intermittent Feavers_ (of all the _Phaenomena_ whereof he ventures
to assign the causes from this _Hypothesis_) so also the _Gout, Syncope's,
Stranguries, Oppilations, Diarrhaeas, Dysenteries, Hysterical_ and _Colick
passions_, &c. All which he concludes with mentioning the waies and
remedies to cure the manifold peccancy of this juyce by Evacuations and
Alterations.

This seeming to be a _new_ as well as a _considerable_ discovery, it is
hop'd, that others will by this intimation be invited to prosecute the same
by further experiments, either to confirm what this Author has started, if
true, or to rectifie it, if he be mistaken.

* * * * *

_NOTE._

In _Fig._ 1. of _Num._ 9 of these Tracts the Graver hath placed the bended
_end_ of the _Springing Wire_ C F, above the _Wire-staple_ B, between it
and the _Ring_ E, of the _Weight_ D; whereas _that_ end should have been so
expressed, as to pass _under_ the _Wire-staple_, betwixt its two Wires,
into the said _Ring_.

* * * * *

_Lo