Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667
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              Power, or by ſome Angel, a very great Cannon bullet were
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              ed up thither, and placed in our Zenith or vertical point, and from
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              thence let go at liberty, it is in his, and alſo in my opinion, a moſt
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              incredible thing that it, in deſcending downwards, ſhould all the
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              way maintain it ſelf in our vertical line, continuing to turn round
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              with the Earth, about its centre, for ſo many dayes, deſcribing
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              under the Equinoctial a Spiral line in the plain of the great circle
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              it ſelf: and under other Parallels, Spiral lines about Cones, and
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              under the Poles falling by a ſimple right line. </s>
              <s>He, in the next
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              place, ſtabliſheth and confirmeth this great improbability by
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              ving, in the way of interrogations, many difficulties impoſſible to
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              be removed by the followers of
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              Copernicus
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              ; and they are, if I do
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              well remember-----.</s>
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              The firſt
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              ction of the
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              dern Author of
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              the little tract of
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              Concluſions.</s>
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              A Cannon
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              let would ſpend
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              more than ſix days
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              in falling from the
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              Concave of the
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              Moon to the
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              tre of the Earth,
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              according to the
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              pinion of that
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              dern Author of the
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              Concluſions.</s>
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              <s>SALV. </s>
              <s>Take up a little, good
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              Simplicius,
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              and do not load me
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              with ſo many novelties at once: I have but a bad memory, and
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              therefore I muſt not go too faſt. </s>
              <s>And in regard it cometh into
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              my minde, that I once undertook to calculate how long time ſuch a
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              grave body falling from the concave of the Moon, would be in
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              paſſing to the centre of the Earth, and that I think I remember
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              that the time would not be ſo long; it would be fit that you ſhew
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              us by what rule this Author made his calculation.</s>
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              <s>SIMP. </s>
              <s>He hath done it by proving his intent
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              à fortiori,
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              a
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              cient advantage for his adverſaries, ſuppoſing that the velocity of
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              the body falling along the vertical line, towards the centre of the
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              Earth, were equal to the velocity of its circular motion, which it
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              made in the grand circle of the concave of the Lunar Orb.
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              </s>
              <s>Which by equation would come to paſſe in an hour, twelve
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              ſand ſix hundred German miles, a thing which indeed ſavours of
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              impoſſibility: Yet nevertheleſſe, to ſhew his abundant caution,
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              and to give all advantages to his adverſaries, he ſuppoſeth it for
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              true, and concludeth, that the time oſ the fall ought however to
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              be more than ſix dayes.</s>
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              <s>SALV. </s>
              <s>And is this the ſum of his method? </s>
              <s>And doth he by
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              this demonſtration prove the time of the fall to be above ſix
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              dayes?</s>
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              <s>SAGR. </s>
              <s>Me thinks that he hath behaved himſelf too modeſtly,
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              for that having it in the power of his will to give what velocity he
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              pleaſed to ſuch a deſcending body, and might aſwell have made it
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              ſix moneths, nay, ſix years in falling to the Earth, he is content
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              with ſix dayes. </s>
              <s>But, good
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              Salviatus,
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              ſharpen my appetite a
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              tle, by telling me in what manner you made your computation, in
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              regard you ſay, that you have heretofore caſt it up: for I am
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              fident that if the queſtion had not required ſome ingenuity in
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              working it, you would never have applied your minde unto
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              it.</s>
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