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

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            <p type="main">
              <s>
                <pb xlink:href="040/01/243.jpg" pagenum="225"/>
              it ſhould run above an hundred yards, he would let the ball
                <lb/>
              merge into the water, & freely deſcend, & diligently obſerve its
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              tion. </s>
              <s>If he would but do thus, he ſhould ſee, firſt, that it would go in a
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              direct line towards that point of the bottom of the veſſel, whither it
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              would tend, if the boat ſhould ſtand ſtill; & to his eye, and in
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              tion to the veſſel, that motion would appear moſt ſtraight and
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              pendicular, and yet he could not ſay, but that it would be compoſed
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              of the right motion downwards, and of the circular about the
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              ment of water. </s>
              <s>And if theſe things befall in matters not natural,
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              and in things that we may experiment in their ſtate of reſt; & then
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              again in the contrary ſtate of motion, and yet as to appearance no
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              diverſity at all is diſcovered, & that they ſeem to deceive our ſenſe
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              what can we diſtinguiſh touching the Earth, which hath been
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              petually in the ſame conſtitution, as to motion and reſt? </s>
              <s>And in
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              what time can we experiment whether any difference is diſcernable
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              amongſt theſe accidents of local motion, in its diverſe ſtates of
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              tion and reſt, if it eternally indureth in but one onely of them?</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg431"/>
                <emph type="italics"/>
              An experiment
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              that ſheweth how
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              the common motion
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              is imperceptible.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>SAGR. </s>
              <s>Theſe Diſcourſes have ſomewhat whetted my ſtomack,
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              which thoſe fiſhes, and ſnails had in part nauſeated; and the former
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              made me call to minde the correction of an errour, that hath ſo
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              much appearance of truth, that I know not whether one of a
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              thouſand would refuſe to admit it as unqueſtionable. </s>
              <s>And it was
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              this, that ſailing into
                <emph type="italics"/>
              Syria,
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              and carrying with me a very good
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                <emph type="italics"/>
              Teleſcope,
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              that had been beſtowed on me by our
                <emph type="italics"/>
              Common Friend,
                <emph.end type="italics"/>
                <lb/>
              who not many dayes before had invented, I propoſed to the
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              riners, that it would be of great benefit in Navigation to make uſe
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              of it upon the round top of a ſhip, to diſcover and kenne Veſſels
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              afar off. </s>
              <s>The benefit was approved, but there was objected the
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                <arrow.to.target n="marg432"/>
                <lb/>
              difficulty of uſing it, by reaſon of the Ships continual fluctuation;
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              and eſpecially on the round top, where the agitation is ſo much
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              greater, and that it would be better for any one that would make
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              uſe thereof to ſtand at the Partners upon the upper Deck, where
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              the toſſing is leſſe than in any other place of the Ship. </s>
              <s>I (for I
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              will not conceal my errour) concurred in the ſame opinion, and
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              for that time ſaid no more: nor can I tell you by what hints I was
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              moved to return to ruminate with my ſelf upon this buſineſſe, and
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              in the end came to diſcover my ſimplicity (although excuſable) in
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              admitting that for true, which is moſt falſe; falſe I ſay, that the
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              great agitation of the basket or round top, in compariſon of the
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              ſmall one below, at the partners of the Maſt, ſhould render the
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              uſe of the
                <emph type="italics"/>
              Teleſcope
                <emph.end type="italics"/>
              more difficult in finding out the object.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg432"/>
                <emph type="italics"/>
              An ingenuous
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              conſideration
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              bout the poſſibility
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              of uſing the
                <emph.end type="italics"/>
                <lb/>
              cope
                <emph type="italics"/>
              with as much
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              facility on the
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              round top of the
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              Maſt of a ſhip,
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              as on the Deck.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>I ſhould have accompanied the Mariners, and your ſelf
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              at the beginning.</s>
            </p>
            <p type="main">
              <s>SIMP. </s>
              <s>And ſo ſhould I have done, and ſtill do: nor can I
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              lieve, if I ſhould think of it an hundred years, that I could
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              ſtand it otherwiſe.</s>
            </p>
          </chap>
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