Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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motions, operations, and other accidents, by which their natures
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are diſtinguiſhed, would not deprive us of the power of coming
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to the knowledge of them; although he ſhould remove thoſe
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perations, in which they unitedly concur, and which for that reaſon
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are of no uſe for the diſtinguiſhing of thoſe natures.</
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<
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>SIMP. </
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>I think your diſſertation to be very good.</
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>SALV. </
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>But that the Earth, Water, Air, are of a nature equally
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conſtituted immoveable about the centre, is it not the opinion of
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your ſelf,
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Ariſtotle, Prolomy,
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and all their ſectators?</
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<
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>SIMP. </
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>Its on all hands granted as an undeniable truth.</
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<
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>SALV. </
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>Then from this common natural condition of
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cence about the centre, there is no argument drawn of the different
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natures of theſe Elements, and things elementary, but that
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knowledge muſt be collected from other qualities not common;
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and therefore whoſo ſhould deprive the Elements of this common
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reſt only, and ſhould leave unto them all their other operations,
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would not in the leaſt block up the way that leadeth to the
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ledge of their eſſences. </
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>But
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Copernicus
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depriveth them onely of
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this common reſt, and changeth the ſame into a common motion,
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leaving them gravity, levity, the motions upwards, downwards, </
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ſlower, faſter, rarity, denſity, the qualities of hot, cold, dry, moiſt,
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and in a word, all things beſides. </
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>Therefore ſuch an abſurdity, as
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this Authour imagineth to himſelf, is no
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Copernican
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poſition; nor
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doth the concurrence in an identity of motion import any more or
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leſs, than the concurrence in an identity of reſt about the
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fying, or not diverſifying of natures. </
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>Now tell us, if there be any
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argument to the contrary.</
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The concurrence
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of the Elements in
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a common motion
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importeth no more
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or leſſe, than their
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concurrence in a
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common reſt.
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>SIMP. </
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>There followeth a fourth objection, taken from a
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ral obſervation, which is,
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That bodies of the ſame kind, have
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tions that agree in kinde, or elſe they agree in reſt. </
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<
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>But by the
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pernican Hypotheſis,
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bodies that agree in kinde, and are moſt ſem-
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blable to one another, would be very diſcrepant, yea diametrically
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repugnant as to motion; for that Stars ſo like to one another, would
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be nevertheleſſe ſo unlike in motion, as that ſix Planets would
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tually turn round; but the Sun and all the fixeed Stars would ſtand
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perpetually immoveable.
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A fourth
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ment againſt
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pernicus.</
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Bodies of the
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ſame kinde have
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motions that agree
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in kinde.
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<
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>SALV. </
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<
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>The forme of the argument appeareth good; but yet
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I believe that the application or matter is defective: and if the
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Authour will but perſiſt in his aſſumption, the conſequence ſhall
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make directly againſt him. </
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<
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>The Argument runs thus; Amongſt
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mundane bodies, ſix there are that do perpetually move, and they
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are the ſix Planets; of the reſt, that is, of the Earth, Sun, and
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fixed Stars, it is diſputable which of them moveth, and which
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ſtands ſtill, it being neceſſary, that if the Earth ſtand ſtill, the Sun
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and ſixed Stars do move; and it being alſo poſſible, that the Sun </
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