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

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1
Mathematician) that the motion of the Earth meeting with the
motion of the Lunar Orb, the concurrence of them occaſioneth
the Ebbing and Flowing, is an abſolute vanity, not onely
cauſe it is not expreſt, nor ſeen how it ſhould ſo happen, but the
falſity is obvious, for that the Revolution of the Earth is not
trary to the motion of the Moon, but is towards the ſame way.
So that all that hath been hitherto ſaid, and imagined by others,
is, in my judgment, altogether invalid.
But amongſt all the
famous men that have philoſophated upon this admirable effect

of Nature, I more wonder at Kepler than any of the reſt, who
being of a free and piercing wit, and having the motion
bed to the Earth, before him, hath for all that given his ear and
aſſent to the Moons predominancy over the Water, and to
cult properties, and ſuch like trifles.
One ſingle
on of the
al Globe ſufficeth
not to produce the
Ebbing & Flowing
The opinion of
Seleucus the
thematician
red.
Kepler is with
veſpect blamed.
SAGR. I am of opinion, that to theſe more ſpaculative
ſons the ſame happened, that at preſent befalls me, namely, the
not underſtanding the intricate commixtion of the three Periods
Annual, Monethly, and Diurnal; And how their cauſes ſhould
ſeem to depend on the Sun, and on the Moon, without the Suns
or Moons having any thing to do with the Water; a buſineſſe,
for the full underſtanding of which I ſtand in need of a little
longer time to conſider thereof, which the novelty and difficulty
of it hath hitherto hindred me from doing: but I deſpair not, but
that when I return in my ſolitude and ſilence to ruminate that
which remaineth in my fancy, not very well digeſted, I ſhall
make it my own.
We have now, from theſe four dayes
courſe, great atteſtations, in favour of the Copernican Syſteme,
amongſt which theſe three taken: the firſt, from the Stations and
Retrogradations of the Planets, and from their approaches, and
receſſions from the Earth; the ſecond, from the Suns revolving
in it ſelf, and from what is obſerved in its ſpots; the third, from
the Ebbing and Flowing of the Sea do ſhew very rational and
concluding.
SALV. To which alſo haply, in ſhort, one might adde a
fourth, and peradventure a fifth; a fourth, I ſay, taken from
the fixed ſtars, ſeeing that in them, upon exact obſervations, thoſe
minute mutations appear, that Copernicus thought to have been
inſenſible.
There ſtarts up, at this inſtant, a fifth novelty, from
which one may argue mobility in the Terreſtrial Globe, by

means of that which the moſt Illuſtrious Signore Cæſare, of the
noble Family of the Marſilii of Bologna, and a Lyncean
demick, diſcovereth with much ingenuity, who in a very learned
Tract of his, ſheweth very particularly how that he had obſerved
a continual mutation, though very ſlow in the Meridian line,
of which Treatiſe, at length, with amazement, peruſed by me,

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