Galilei, Galileo
,
The systems of the world
,
1661
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from the Earth, continue a good ſpace of time in the Air, ſuch
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as are the Clouds, Birds of flight; and as of them it cannot be
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ſaid that they are rapt or tranſparted by the Earth, having no
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heſion thereto, it ſeems not poſſible, that they ſhould be able to
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keep pace with the velocity thereof; nay it ſhould rather ſeem
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to us, that they all ſwiftly move towards the Weſt: And if
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being carried about by the Earth, paſſe our parallel in twenty
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four hours, which yet is at leaſt ſixteen thouſand miles, how can
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Birds follow ſuch a courſe or revolution? </
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>Whereas on the
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trary, we ſee them fly as well towards the Eaſt, as towards the
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Weſt, or any other part, without any ſenſible difference. </
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over, if when we run a Horſe at his ſpeed, we feel the air beat
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vehemently againſt our face, what an impetuous blaſt ought we
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perpetually to feel from the Eaſt, being carried with ſo rapid a
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courſe againſt the wind? </
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>and yet no ſuch effect is perceived. </
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>Take
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another very ingenious argument inferred from the following
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periment. </
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>The circular motion hath a faculty to extrude and
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ſipate from its Centre the parts of the moving body, whenſoever
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either the motion is not very ſlow, or thoſe parts are not very
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well faſtened together; and therefore, if
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v. </
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we ſhould turn
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one of thoſe great wheels very faſt about, wherein one or more
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men walking, crane up very great weights, as the huge maſſie
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ſtone, uſed by the Callander for preſſing of Cloaths; or the
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fraighted Barks which being haled on ſhore, are hoiſted out of
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one river into another; in caſe the parts of that ſame Wheel ſo
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ſwiftly turn'd round, be not very well joyn'd and pin'd together,
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they would all be ſhattered to pieces; and though many ſtones or
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other ponderous ſubſtances, ſhould be very faſt bound to its outward
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Rimme, yet could they not reſiſt the impetuoſity, which with
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great violence would hurl them every way far from the Wheel,
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and conſequently from its Centre. </
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<
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>So that if the Earth did move
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with ſuch and ſo much greater velocity, what gravity, what
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city of lime or plaiſter would keep together Stones, Buildings, and
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whole Cities, that they ſhould not be toſt into the Air by ſo
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cipitous a motion? </
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>And both men and beaſts, which are not
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ſtened to the Earth, how could they reſiſt ſo great an
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impetus
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?
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>Whereas, on the other ſide, we ſee both theſe, and far leſſe
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ſiſtances of pebles, ſands, leaves reſt quietly on the Earth, and
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to return to it in falling, though with a very ſlow motion. </
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<
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>See
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here,
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Simplicius,
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the moſt potent arguments, taken, to ſo ſpeak,
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from things Terreſtrial; there remain thoſe of the other kind,
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namely, ſuch as have relation to the appearances of Heaven,
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which reaſons, to confeſſe the truth, tend more to prove the
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Earth to be in the centre of the Univerſe, and conſequently, to
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deprive it of the annual motion about the ſame, aſcribed unto it </
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