Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667

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1where I was ſtranded, and forced to ſtay there more than a full
hour, in expecting the return of the tide: and there waiting in
this manner, without being able to get out of the boat, which on a
ſudden ran a ground, I obſerved a certain accident, which to me

ſeemed very ſtrange; and it was this, that in the waters ebbing
I ſaw it retreat very faſt by ſeveral ſmall rivolets, the ouze being
in many places diſcovered, and whilſt I ſtood looking upon this
fect, I ſaw this motion in an inſtant to ceaſe, and without a
nutes interval the ſame water to begin to return back again, and
the tide from ebbing to become young flood, without ſtanding
ſtill a moment: an effect that as long as I have dwelt in Venice,
I never took notice of before.
The motion of
the water in ebbing
and flowing not
terrupted by reſt.
SAGR. It is very much, that you ſhould be left thus on ground,
amongſt ſmall Channels; in which rivolets, as having very little
declivity, the riſing or falling of the main ſea, the thickneſs onely
of a paper is ſufficient to make the water to ebbe and flow for good
long ſpaces of time: like as in ſome creeks of the Sea, its flowing
four or ſix ^{*} yards onely, maketh the water to overflow the
cent Marſhes for ſome hundreds and thouſands of ^{*}
* Pertiche
tiani.
SIMP. This I know very well, but I ſhould have thought, that
between the ultimate terme of ebbing, and the firſt beginnng to
flow, there ſhould have interpoſed ſome conſiderable interval of
reſt.
SAGR. This will appear unto you, if you caſt your eye upon
the bank or piles, where theſe mutations are made
ly, but not that there is any real time of ceſſation.
SIMP. I did think, that becauſe theſe two motions were
trary, there ought to be in the midſt between them ſome kind of
reſt; conformable to the Doctrine of Ariſtotle, which demonſtrates.
that in puncto regreſſus mediat quies.
SAGR. I very well remember this place: but I bear in minde
alſo, that when I read Philoſophy, I was not thorowly ſatisfied
with Ariſtotles demonſtration; but that I had many experiments
on the contrary, which I could ſtill rehearſe unto you, but I am
unwilling to ſally out into any other digreſſions, we being met
here to diſcourſe of the propoſed mattes, if it be poſſible, without
theſe excurſions wherewith we have interrupted our diſputes in
thoſe dayes that are paſt.
SIMP. And yet we may with convenience, if not interrupt
them, at leaſt prolong them very much, for returning
day home, I ſet my ſelſ to read the Tractate of Concluſions, where
I find Demonſtrations againſt this annual motion aſcribed to the
Earth, very ſolid; and becauſe I would not truſt my memory with
the punctual relation of them, I have brought back the Book
long with me.

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