Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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alledged. </
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<
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>For theſe birds which at their pleaſure flie
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wards and backwards, and wind to and again in a thouſand
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faſhions, and, which more importeth, lie whole hours upon the
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wing, theſe I ſay do not a little poſe me, nor do I ſee, how
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mongſt ſo many circumgyrations, they ſhould not loſe the motion
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of the Earth, and how they ſhould be able to keep pace with
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ſo great a velocity as that which they ſo far exceed with their flight.</
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>SALV. </
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>To ſpeak the truth, your ſcruple is not without reaſon,
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and its poſſible
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Copernicus
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himſelf could not find an anſwer for it,
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that was to himſelf entirely ſatisfactory; and therefore haply paſt
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it over in ſilence albeit he was, indeed, very brief in examining
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the other allegations of his adverſaries, I believe through his
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height of wit, placed on greater aud ſublimer contemplations,
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like as Lions are not much moved at the barking of little Dogs.
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<
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>We will therefore reſerve the inſtance of birds to the laſt place,
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and for the preſent, ſee if we can give
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Simplicius
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ſatisfaction in
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the others, by ſhewing him in our wonted manner, that he
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ſelf hath their anſwers at hand, though upon firſt thoughts he doth
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not diſcover them. </
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<
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>And to begin with the ſhots made at randome,
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with the ſelf ſame piece, powder, and ball, the one towards the Eaſt,
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the other towards the Weſt, let him tell me what it is that perſwades
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him to think that the Range towards the Weſt (if the diurnal
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verſion belonged to the Earth) ought to be much longer than that
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towards the
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The reaſon why
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a Gun ſhould ſiem
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to carry farther
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wards the Weſt
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than towards the
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Eaſt.
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>SIMP. </
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>I am moved ſo to think; becauſe in the ſhot made
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wards the Eaſt, the ball whil'ſt it is out of the piece, is
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ed by the ſaid piece, the which being carried round by the Earth,
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runneth alſo with much velocity towards the ſame part,
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upon the fall of the ball to the ground, cometh to be but little
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diſtant from the piece. </
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<
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>On the contrary in the ſhot towards the
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Weſt, before that the ball falleth to the ground, the piece is
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tired very far towards the Eaſt, by which means the ſpace
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tween the ball and the piece, that is Range, will appear longer
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than the other, by how much the piece, that is the Earth, had
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run in the time that both the bals were in the air.</
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>SALV. </
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<
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>I could wiſh, that we did know ſome way to make an
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experiment correſponding to the motion of theſe projects, as that
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of the ſhip doth to the motion of things perpendicularly falling
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from on high; and I am thinking how it may be done.</
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The experiment
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of a running
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riot to find out the
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difference of
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ges.
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<
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>SAGR. </
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>I believe, that it would be a very oppoſite proof, to
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take an open Chariot, and to accomodate therein a ^{*}Stock-bow
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at half elevation, to the end the flight may prove the greateſt </
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that my be, and whil'ſt the horſes ſhall run, to ſhoot firſt towards
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the part whither you drive, and then another backwards towards
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the contrary part, cauſing ſome one to mark diligently where
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the Chariot was in that moment f time when the ſhaft came to </
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