Foscarini, Paolo Antonio, An epistle to fantoni, 1661

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              others may not, at leaſt, taken
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              collectively
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              : now thoſe are pe­
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              riſhable, but theſe perpetual. </s>
              <s>The Earth therefore ſince it
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              is reckoned amongſt thoſe things that are permanent, as hath
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              been ſaid already, hath its parts, not diſſipable, nor
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              ab invicem,
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              ſeparable from its Centre (whereby its true and proper place is
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              aſſigned it) and from its whole, taken collectively: becauſe ac­
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              cording to its whole it is always preſerved, compact, united, and
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              cohærent in it ſelf, nor can its parts be ſeperated from the Cen­
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              tre, or from one another, unleſs it may ſo fall out
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              per accidens,
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              and violently in ſome of its parts; which afterwards, the obſtacle
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              being removed, return to their Natural Station ſpontaneouſly,
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              and without any impulſe. </s>
              <s>In this Senſe therefore the Earth is
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              ſaid to be Immoveable, and Immutable: yea even the Sea, Aire,
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              Heaven, and any other thing (although otherwiſe moveable) ſo
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              long as its parts are not diſſipable and ſeperable, may be ſaid to
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              be Immoveable, at leaſt taken
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              collectively.
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              This Principle
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              or Maxim differeth from the precedent only in that this referrs
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              to the parts in order to
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              Place,
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              and this, in order to the Whole.</s>
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              The Earths Cen­
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              tre keepeth it in
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              its Natural Place.
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              <s>From this Speculation another Secret is diſcovered. </s>
              <s>For hence
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              it is manifeſt wherein the proper and genuine formality of the
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              Gravity aad Levity of Bodyes conſiſteth; a point which is not ſo
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              clearly held forth, nor ſo undeniably explained by the Peripate­
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              tick Phyloſophy.
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              Gravity
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              therefore is nothing elſe according to
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              the Principles of this new Opinion, than a certain power and ap­
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              petite of the Parts to rejoyn with their Whole, and there to reſt
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              as in their proper place. </s>
              <s>Which Faculty or Diſpoſition is by
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              Divine Providence beſtowed not only on the Earth, and Ter­
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              rene Bodies, but, as is believed, on Cœleſtial Bodies alſo, name­
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              ly the Sun, Moon, and Starrs; all whoſe parts are by this Impul­
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              ſion connected, and conſerved together, cleaving cloſely to each
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              other, and on all ſides preſſing towards their Centre, until they
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              come to reſt there. </s>
              <s>From which Concourſe and Compreſſion a
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              Sphærical and Orbicular Figure of the Cæleſtial Orbes is produ­
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              ced, wherein by this occult Quality naturally incident to
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              each of them they of themſelves ſubſiſt, and are alwayes preſer­
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              ved. </s>
              <s>But
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              Levity
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              is the Extruſion and Excluſion of a more te­
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              nuoſe and thin Body from the Commerce of one more Solid and
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              denſe, that is Heterogeneal to it, by vertue of Heat. </s>
              <s>Where­
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              upon, as the Motion of Grave Bodies is
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              Compreſſive,
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              ſo the Mo­
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              tion of Light Bodies is
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              Extenſive:
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              For its the propperty of Heat
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              to dilate and rarify thoſe things to which it doth apply, conjoine
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              and communicate it ſelf. </s>
              <s>And for this reaſon we find Levity
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              and Gravity not only in reſpect of this our Tereſtrial Globe, and
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              the Bodies adjacent to it, but alſo in reſpect of thoſe Bodies
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              which are ſaid to be in the Heavens, in which thoſe parts which </s>
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