Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667

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              <s>
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              been partaker, as part of the ſhip, at the time that it was upon
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              the Maſt; the other is the new motion of deſcent, which alſo
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              muſt needs be an hinderance of that other progreſſive motion.</s>
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              <s>SALV. </s>
              <s>As to the impediment of the Air, I do not deny it
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              you; and if the thing falling were a light matter, as a feather,
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              or a lock of wool, the retardation would be very great, but in
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              an heavy ſtone is very exceeding ſmall. </s>
              <s>And you your ſelf but
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              even now did ſay, that the force of the moſt impetuous wind
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              ſufficeth not to ſtir a great ſtone from its place; now do but
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              ſider what the calmer air is able to do, being encountred by a
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              ſtone no more ſwift than the whole ſhip. </s>
              <s>Nevertheleſſe, as I ſaid
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              before, I do allow you this ſmall effect, that may depend upon
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              ſuch an impediment; like as I know, that you will grant to me,
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              that if the air ſhould move with the ſame velocity that the ſhip
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              and ſtone hath, then the impediment would be nothing at all.
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              </s>
              <s>As to the other of the additional motion downwards; in the firſt
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              place it is manifeſt, that theſe two, I mean the circular, about
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              the centre, and the ſtreight, towards the centre, are not
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              ries, or deſtructive to one another, or incompatible. </s>
              <s>Becauſe that
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              as to the moveable, it hath no repugnance at all to ſuch motions,
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              for you your ſelf have already confeſt the repugnance to be
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              gainſt the motion which removeth from the centre, and the
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              nation to be towards the motion which approacheth to the centre.
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              </s>
              <s>Whence it doth of neceſſity follow, that the moveable hath
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              ther repugnance, nor propenſion to the motion which neither
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              proacheth, nor goeth from the centre, nor conſequently is there
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              any cauſe for the diminiſhing in it the faculty impreſſed. </s>
              <s>And
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              aſmuch as the moving cauſe is not one alone, which it hath
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              tained by the new operation of retardation; but that they are
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              two, diſtinct from each other, of which, the gravity attends
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              ly to the drawing of the moveable towards the centre, and the
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              vertue impreſs't to the conducting it about the centre, there
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              maineth no occaſion of impediment.</s>
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              <s>SIMPL. </s>
              <s>Your argumentation, to give you your due, is very
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              probable; but in reality it is invelloped with certain intricacies,
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              that are not eaſie to be extricated. </s>
              <s>You have all along built upon
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                <arrow.to.target n="marg317"/>
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              a ſuppoſition, which the
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              Peripatetick
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              Schools will not eaſily grant
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              you, as being directly contrary to
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              Aristotle,
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              and it is to take for
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              known and manifeſt, That the project ſeparated from the
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              cient, continueth the motion by
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              vertue impreſſed
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              on it by the
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              ſaid projicient, which
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              vertue impreſſed
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              is a thing as much
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              ſted in
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              Peripatetick
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              Philoſophy, as the paſſage of any accident
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              from one ſubject into another. </s>
              <s>Which doctrine doth hold, as I
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              believe it is well known unto you, that the project is carried by
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              the
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              medium,
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              which in our caſe happeneth to be the Air. </s>
              <s>And </s>
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