Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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principle of the Elements. </
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>Which is manifeſt, for that if I aske
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the
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Peripatetick,
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if, being of opinion that Cœleſtial bodies are
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incorruptibe and eternal, he believeth that the Terreſtial Globe
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is not ſo, but corruptible and mortal, ſo that there ſhall come a
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time, when the Sun and Moon and other Stars, continuing their
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beings and operations, the Earth ſhall not be found in the
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World, but ſhall with the reſt of the Elements be deſtroyed
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and annihilated, I am certain that he would anſwer me, no:
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therefore generation and corruption is in the parts and not in the
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whole; and in the parts very ſmall and ſuperficial, which are,
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as it were, incenſible in compariſon of the whole maſſe. </
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>And
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becauſe
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Ariſtotle
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deduceth generation and corruption from the
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contrariety of ſtreight motions, let us remit ſuch motions to the
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parts, which onely change and decay, and to the whole Globe
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and Sphere of the Elements, let us aſcribe either the circular
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tion, or a perpetual conſiſtance in its proper place: the only
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affections apt for perpetuation, and maintaining of perfect order.
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>This which is ſpoken of the Earth, may be ſaid with the ſame
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reaſon of Fire, and of the greateſt part of the Air; to which
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Elements, the
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Peripateticks
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are forced to aſcribe for intrinſical
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and natural, a motion wherewith they were never yet moved,
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nor never ſhall be; and to call that motion preternatural to them,
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wherewith, if they move at all, they do and ever ſhall move.
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<
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>This I ſay, becauſe they aſſign to the Air aud Fire the motion
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upwards, wherewith thoſe Elements were never moved, but
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only ſome parts of them, and thoſe were ſo moved onely in
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der to the recovery of their perfect conſtitution, when they were
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out of their natural places; and on the contrary they call the
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circular motion preternatural to them, though they are thereby
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inceſſantly moved: forgeting, as it ſeemeth, what
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Ariſtotle
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oft
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culcateth, that nothing violent can be permanent.</
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Ariſt.
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&
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Ptolomey
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make the
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strial Globe
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veable.
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It is better to ſay,
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that the
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al Globe naturally
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resteth, than that
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it moveth directly
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downwards.
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*The word is,
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all'
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ingiù,
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which the
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Latine verſion
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dreth
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ſurſùm,
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which is quite
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trary to the
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thors ſenſe.</
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Right Motion
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with more reaſon
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attributed to the
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parts, than to the
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whole Elements.
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The Peripateticks
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improperly aſſign
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thoſe motious to
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the Elements for
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Natural, with
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which they never
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were moved, and
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thoſe for
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natural with which
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they alwayes are
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moved.
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<
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>SIMPL. </
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>To all theſe we have very pertinent anſwers, which
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I for this time omit, that we may come to the more particular
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reaſons, and ſenſible experiments, which ought in concluſion to
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be oppoſed, as
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Ariſtotle
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ſaitn well, to whatever humane reaſon
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can preſent us with.</
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Senſible
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ments to be
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red to humane
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Arguments.
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<
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>SAGR. </
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>What hath been ſpoken hitherto, ſerves to clear up
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unto us which of the two general diſcourſes carrieth with it moſt
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of probability, I mean that of
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Ariſtotle,
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which would perſwade
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us, that the ſublunary bodies are by nature generable, and
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ptible,
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&c.
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and therefore moſt different from the eſſence of
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leftial bodies, which are impaſſible, ingenerable, incorruptible,
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&c.
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drawn from the diverſity of ſimple motions; or elſe this of
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Salviatus,
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who ſuppoſing the integral parts of the World to be
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diſpoſed in a perfect conſtitution, excludes by neceſſary </
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