Galilei, Galileo, The systems of the world, 1661

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1Gulph, leſſe by far than the reſt of the Mediterrane, and placed in
ſo different an inclination, that whereas that hath its bounds that
incloſeth it on the Eaſtern part, as are the Coaſts of Syria, this is
ſhut up in its more Weſterly part: and becauſe the ebbings and
flowings are much greater towards the extremities, yea, becauſe
the Seas riſings and fallings are there onely greateſt, it may
bably happen that the times of Flood at Venice may be the time of
low Water in the other Sea, which, as being much greater, and
diſtended more directly from Weſt to Eaſt, cometh in a certain
ſort to have dominion over the Adriatick: and therefore it
would be no wonder, in caſe the effects depending on the
mary cauſes, ſhould not hold true in the times that they ought,
and that correſpond to the periods in the Adriatick, as it doth
in the reſt of the Mediterrane.
But theſe Particularities require
long Obſervations, which I neither have made as yet, nor ſhall I
ever be able to make the ſame for the future.
SAGR. You have, in my opinion, done enough in opening us
the way to ſo lofty a ſpeculation, of which, if you had given us
no more than that firſt general Propoſition that ſeemeth to me to
admit of no reply, where you declare very rationally, that the
Veſſels containing the Sea-waters continuing ſtedfaſt, it would
be impoſſible, according to the common courſe of Nature, that
thoſe motions ſhould follow in them which we ſee do follow;
and that, on the other ſide, granting the motions aſcribed, for
ther reſpects, by Copernicus to the Terreſtrial Globe, theſe ſame
alterations ought to enſue in the Seas, if I ſay you had told us no
more, this alone in my judgment, ſo far exceeds the vanities
troduced by ſo many others, that my meer looking on them
makes me nauſeate them, and I very much admire, that among
men of ſublime wit, of which nevertheleſs there are not a few,
not one hath ever conſidered the incompatibility that is between
the reciprocal motion of the Water contained, and the
lity of the Veſſel containing, which contradiction ſeemeth to me
now ſo manifeſt.
SALV. It is more to be admired, that it having come into the

thoughts of ſome to refer the cauſe of the Tide to the motion of
the Earth, therein ſhewing a more than common apprehenſion,
they ſhould, in afterwards driving home the motion cloſe with
no ſide; and all, becauſe they did not ſee that one ſimple and
uniform motion, as v. gr. the ſole diurnal motion of the
ſtrial Globe, doth not ſuffice, but that there is required an
ven motion, one while accelerated, and another while retarded:
for when the motion of the Veſſels are uniforme, the waters
contained will habituate themſelves thereto, without ever
king any alteration.
To ſay alſo (as it is related of an ancient

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