Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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are of two kinds: ſome have reſpect to the accidents Terreſtrial,
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without any relation to the Stars, and others are taken from the
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Phænomena
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and obſervations of things Cœleſtial. </
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<
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>The arguments
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of
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Ariſtotle
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are for the moſt part taken from things neer at hand,
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and he leaveth the others to
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Aſtronomers
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; and therefore it is the
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beſt way, if you like of it, to examine theſe taken from
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ments touching the Earth, and then proceed to thoſe of the other
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kind. </
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Ptolomy, Tycho,
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and the other
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Aſtronomers
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and
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Philoſophers,
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beſides the arguments of
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Ariſtotle
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by them
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med, confirmed, and made good, do produce certain others; we
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will put them all together, that ſo we may not anſwer twice to
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the ſame, or the like objections. </
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>Therefore
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Simplicius,
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chooſe
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whether you will recite them your ſelf, or cauſe me to eaſe you of
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this task, for I am ready to ſerve you.</
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Two kindes of
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Arguments
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ching the Earths
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motion or rest.
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Arguments of
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Ptolomy
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and
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cho,
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and other
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ſons, over and
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bove thoſe of
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ſtotle.</
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<
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>SIMPL. </
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>It is better that you quote them, becauſe, as having
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taken more pains in the ſtudy of them, you can produce them with
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more readineſſe, and in greater
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The firſt
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ment taken from
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grave bodies
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ling from on high
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to the ground.
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>SALV. All, for the ſtrongeſt reaſon, alledge that of grave
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dies, which falling downwards from on high, move by a right line,
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that is perpendicular to the ſurface of the Earth, an argument
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which is held undeniably to prove that the Earth is immoveable:
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for in caſe it ſhould have the diurnal motion, a Tower, from the
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top of which a ſtone is let fall, being carried along by the
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ſion of the Earth, in the time that the ſtone ſpends in falling, would
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be tranſported many hundred yards Eaſtward, and ſo far diſtant
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from the Towers foot would the ſtone come to ground. </
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<
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>The
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which effect they back with another experiment; to wit, by let</
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ting a bullet of lead fall from the round top of a Ship, that lieth at
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anchor, and obſerving the mark it makes where it lights, which they
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find to be neer the ^{*} partners of the Maſt; but if the ſame bullet
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be let fall from the ſame place when the ſhip is under ſail, it ſhall
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light as far from the former place, as the ſhip hath run in the time
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of the leads deſcent; and this for no other reaſon, than becauſe
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the natural motion of the ball being at liberty is by a right line
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wards the centre of the Earth. </
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>They fortiſie this argument with
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the experiment of a projection ſhot on high at a very great
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ſtance; as for example, a ball ſent out of a Cannon, erected
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pendicular to the horizon, the which ſpendeth ſo much time in
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cending and falling, that in our parallel the Cannon and we both
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ſhould be carried by the Earth many miles towards the Eaſt, ſo
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that the ball in its return could never come neer the Peece, but
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would fall as far Weſt, as the Earth had run Eaſt. </
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<
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>They againe
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adde a third, and very evident experiment,
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ſcilicet,
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that ſhooting a
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bullet point blank (or as Gunners ſay, neither above nor under
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tal) out of a Culverin towards the Eaſt, and afterwards another, </
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