Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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none of thoſe who aſcribe that principle to the ambient air. </
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>As
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to the Miracle, or an Angel, I ſhould rather incline to this ſide; for
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that which taketh beginning from a Divine Miracle, or from an
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Angelical operation; as for inſtance, the tranſportation of a
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non ball or bullet into the concave of the Moon, doth in all
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bability depend on the vertue of the ſame principle for
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ing the reſt. </
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>But, as to the Air, it ſerveth my turn, that it doth
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not hinder the circular motion of the moveables, which we did
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ſuppoſe to move thorow it. </
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>And to prove that, it ſufficeth (nor is
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more required) that it moveth with the ſame motion, and
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eth its circulations with the ſame velocity, that the Terreſtrial
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Globe doth.</
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>SIMP. </
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>And he likewiſe makes his oppoſition to this alſo;
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demanding who carrieth the air about, Nature, or Violence?
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>And proveth, that it cannot be Nature, alledging that that is
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trary to truth, experience, and to
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Copernicus
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himſelf.</
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<
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>SALV. </
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>It is not contrary to
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Copernicus
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in the leaſt, who writeth
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no ſuch thing; and this Author aſcribes theſe things to him with
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two exceſſive courteſie. </
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>It's true, he ſaith, and for my part I
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think he ſaith well, that the part of the air neer to the Earth,
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ing rather a terreſtrial evaporation, may have the ſame nature,
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and naturally follow its motion; or, as being contiguous to it,
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may follow it in the ſame manner, as the Peripateticks ſay, that
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the ſuperiour part of it, and the Element of fire, follow the
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tion of the Lunar Concave, ſo that it lyeth upon them to declare,
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whether that motion be natural, or violent.</
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<
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>SIMP. </
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<
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>The Author will reply, that if
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Copernicus
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maketh only
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the inferiour part of the Air to move, and ſuppoſeth the upper
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part thereof to want the ſaid motion, he cannot give a reaſon, how
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that quiet air can be able to carry thoſe grave bodies along with
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it, and make them keep pace with the motion of the Earth.</
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<
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>SALV.
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Copernicus
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will ſay, that this natural propenſion of the
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elementary bodies to ſollow the motion of the Earth, hath a
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mited Sphere, out of which ſuch a natural inclination would ceaſe;
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beſides that, as I have ſaid, the Air is not that which carrieth the
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moveables along with it; which being ſeparated from the Earth,
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do follow its motion; ſo that all the objections come to nothing,
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which this Author produceth to prove, that the Air cannot cauſe
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ſuch effects.</
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The propenſion
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of elementary
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dies to follow the
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Earth, hath a
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mited Sphere of
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activity.
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<
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>SIMP. </
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>To ſhew therefore, that that cannot be, it will be
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ſary to ſay, that ſuch like effects depend on an interne principle,
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againſt which poſition,
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oboriuntur difficillimæ, immò inextricabiles
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quæſtiones ſecundæ,
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of which ſort are theſe that follow.
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pium illud internum vel eſt accidens, vel ſubſtantia. </
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<
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>Si primum;
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quale nam illud? </
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<
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>nam qualitas locomotiva circum, hactenus nulla
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