Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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Tycho
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nor his
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followers ever
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tempted to ſee
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ther there are any
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appearances in the
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Firmament for or
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against the annual
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motion.
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<
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>SALV. </
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>I am of the ſame judgment, and verily believe that
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they argue
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contra hominem,
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ſtudying more to defend another
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man, than deſiring to come to the knowledge of the truth. </
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I do not only believe, that none of them ever applied themſelves
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to make any ſuch obſervation, but I am alſo uncertain, whether
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any of them do know what alteration the Earths annual motion
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ought to produce in the fixed ſtars, in caſe the ſtarry Sphere were
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not ſo far diſtant, as that in them the ſaid diverſity, by reaſon of
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its minuity diſ-appeareth; for their ſurceaſing that inquiſition,
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and referring themſelves to the meer aſſertion of
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Copernicus,
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may very well ſerve to convict a man, but not to acquit him of
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the fact: For its poſſible that ſuch a diverſity may be, and yet
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not have been ſought for; or that either by reaſon of its
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ty, or for want of exact Inſtruments it was not diſcovered by
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pernicus
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; for though it were ſo, this would not be the firſt thing,
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that he either for want of Inſtruments, or for ſome other defect
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hath not known; and yet he proceeding upon other ſolid and
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rational conjectures, affirmeth that, which the things by him not
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diſcovered do ſeem to contradict: for, as hath been ſaid already,
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without the Teleſcope, neither could
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Mars
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be diſcerned to
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creaſe 60. times; nor
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Venus
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40. more in that than in this
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on; yea, their differences appear much leſſe than really they are:
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and yet nevertheleſſe it is certainly diſcovered at length, that
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thoſe mutations are the ſame, to an hair that the
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Copernican
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ſteme required. </
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>Now it would be very well, if with the greateſt
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accurateneſſe poſſible one ſhould enquire whether ſuch a
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tion as ought to be diſcoverable in the fixed ſtars, ſuppoſing the
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annual motion of the Earth, would be obſerved really and in
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effect, a thing which I verily believe hath never as yet been done
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by any; done, ſaid I? no, nor haply (as I ſaid before) by many
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well underſtood how it ought to be done. </
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<
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>Nor ſpeak I this at
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randome, for I have heretofore ſeen a certain Manuſcript of
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one of theſe
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Anti-Copernicans,
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which ſaid, that there would
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ceſſarily follow, in caſe that opinion were true, a continual
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ſing and falling of the Pole from ſix moneths to ſix moneths,
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cording as the Earth in ſuch a time, by ſuch a ſpace as is the
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meter of the grand Orb, retireth one while towards the North, and
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another while towards the South; and yet it ſeemed to him
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nable, yea neceſſary, that we, following the Earth, when we were
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towards the North ſhould have the Pole more elevated than when
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we are towards the South. </
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>In this very error did one fall that was
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otherwiſe a very skilful Mathematician, & a follower of
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Copernic.
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as
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Tycho
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relateth in his ^{*}
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Progymnaſma. </
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<
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684. which ſaid, that he
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had obſerved the Polar altitude to vary, and to differ in Summer
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from what it is in Winter: and becauſe
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Tycho
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denieth the merit </
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