Foscarini, Paolo Antonio, An epistle to fantoni, 1661

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              yet it abideth ſtill in the ſame place, as if it were perpetually im­
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              moveable. </s>
              <s>But right Motion, which is properly
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              ad locum, [to a
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              place]
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              can be aſcribed only to thoſe things which are out of their
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              naturall place, being far from union with one another, and from
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              unity with their whole, yea that are ſeperated and divided from
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              it: Which being that it is contrary to the Nature and forme of
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              the Univerſe, it neceſſarily followeth, that right Motion doth in
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              ſhort ſute with thoſe things which are deſtitute of that perfection,
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              that according to their proper Nature belongeth to them, and
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              which by this ſame right Motion they labour to obtaine, untill
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              they are redintigrated with their Whole, and with one another,
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              and reſtored to their Naturall place; in which at the length,
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              having obtained their perfection, they ſettle and remaine immove­
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              able. </s>
              <s>Therefore in right Motions there can be no Uniformity,
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              nor ſimplicity; for that they vary by reaſon of the uncertaine
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              Levity or Gravity of their reſpective Bodyes: for which cauſe
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              they do not perſevere in the ſame Velocity or Tardity to the end
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              which they had in the beginning. </s>
              <s>Hence we ſee that thoſe things
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              whoſe weight maketh them tend downwards, do deſcend at firſt
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              with a ſlow Motion; but afterwards, as they approach neerer
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              and neerer to the Centre, they precipitate more and more ſwiftly.
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              <s>And on the otherſide, thoſe things which by reaſon of their light­
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              neſs are carryed upwards (as this our Terreſtriall fire, which is no­
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              thing elſe but a ſmoak that burneth, and is inkindled into a flame)
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              are no ſooner aſcended on high, but, in almoſt the ſelf-ſame mo­
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              ment, they fly and vaniſh out of fight; by reaſon of the rare­
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              faction and extenſion, that they as ſoon as they acquire, are freed
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              from thoſe bonds which violently and againſt their own Nature
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              kept them under, and deteined them here below. </s>
              <s>For which
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              reaſon, it is very apparent, that no Right Motion can be called
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              Simple, not only in regard that (as hath been ſaid) it is not
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              ^{*} even and uniforme, but alſo becauſe it is mixt with the Circu­
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              lar, which lurketh in the Right by an occult conſent,
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              ſcilicet
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              by
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              reaſon of the Natural affection of the Parts to conforme unto
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              their Whole. </s>
              <s>For when the Whole moveth Circularly, it is re­
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              quiſite likewiſe that the Parts, to the end that they may be uni­
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              ted to their Whole, (howbeit
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              per accidens
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              they are ſometimes
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              moved with a Right Motion) do move (though not ſo appa­
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              rently) with a Circular Motion, as doth their Whole. </s>
              <s>And thus
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              at length we have evinced that Circular Motion only is Simple,
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              Uniform and ^{*} Æquable, and of the ſame tenor [
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              or rate
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              ] for that
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              it is never deſtitute of its interne Cauſe: whereas on the contra­
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              ry, Right Motion, (which pertains to things both Heavy and
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              Light) hath a Cauſe that is imperfect and deficient, yea that ari­
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              ſeth from Defect it ſelf, and that tendeth to, and ſeeketh after </s>
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