Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667
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              <s>
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              body that moveth, one of its extreams ſtanding ſtill without
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              ching place, the motion muſt needs be circular, and no other: and
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                <arrow.to.target n="marg458"/>
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              becauſe in the living creatures moving, one of its members doth
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              not ſeparate from the other its conterminal, therefore that motion
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              is of neceſſity circular.</s>
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            <p type="margin">
              <s>
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                <emph type="italics"/>
              The Flexures in
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              animals are not
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              made for the
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              verſity of motions.
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              <s>
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              The motions of
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              animals are of one
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              ſort.
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              <s>
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              The ends of the
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              bones are all
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              tund.
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              <s>
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                <emph type="italics"/>
              It is
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              ted, that the ends
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              of the bones are of
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              neceſſity to be
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              tund.
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              </s>
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              The motions of
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              animals are all
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              circular.
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              </s>
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              <s>SIMP. </s>
              <s>How can this be? </s>
              <s>For I ſee the animal move with an
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              hundred motions that are not circular, and very different from one
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              another, as to run, to skip, to climbe, to deſcend, to ſwim, and
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              many
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                <arrow.to.target n="marg459"/>
              </s>
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              Secondary
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              ons of animals
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              pendent on the firſt
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              </s>
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              <s>SALV. </s>
              <s>Tis well: but theſe are ſecondary motions, depending
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              on the preceding motions of the joynts and flexures. </s>
              <s>Upon the
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              plying of the legs to the knees, and the thighs to the hips, which
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              are circular motions of the parts, is produced, as conſequents, the
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              skip, or running, which are motions of the whole body, and theſe
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              may poſſibly not be circular. </s>
              <s>Now becauſe one part of the ter­</s>
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              <s>
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              reſtrial Globe is not required to move upon another part
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              able, but that the motion is to be of the whole body, there is no
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              need in it of flexures.</s>
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            <p type="margin">
              <s>
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                <emph type="italics"/>
              The
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              Terreſtriall
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              Globe
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              hath noe
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              need of flexures.
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              </s>
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              <s>SIMP. </s>
              <s>This (will the aduerſary rejoyn) might be, if the
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              on were but one alone, but they being three, and thoſe very
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              ferent from each other, it is not poſſible that they ſhould concur in
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              an ^{*} articulate body.</s>
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            <p type="margin">
              <s>
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              * Without joynts</s>
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            <p type="main">
              <s>SALV. </s>
              <s>I verily believe that this would be the anſwer of the
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              Philoſopher. </s>
              <s>Againſt which I make oppoſition another way; and
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              ask you, whether you think that by way of joynts and flexures one
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              may adapt the terreſtrial Globe to the participation of three
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              rent circular motions? </s>
              <s>Do you not anſwer me? </s>
              <s>Seeing you are
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              ſpeechleſſe, I will undertake to anſwer for the Philoſopher, who
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              would abſolutely reply that they might; for that otherwiſe it
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              would have been ſuperfluous, and beſides the purpoſe to have
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              poſed to conſideration, that nature maketh the flexions, to the
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              end, the moveable may move with different motions; and that
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              therefore the terreſtrial Globe having no flexures, it cannot have
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              thoſe three motions which are aſcribed to it. </s>
              <s>For if he had
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              thought, that neither by help of flexures, it could be rendered apt
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              for ſuch motions, he would have freely affirmed, that the Globe
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              could not move with three motions. </s>
              <s>Now granting this, I intreat
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              you, and by you, if it were poſſible, that Philoſopher,
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              thor of the Argument, to be ſo courteous as to teach me in what
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              manner thoſe flexures ſhould be accommodated, ſo that thoſe
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              three motions might commodiouſly be excerciſed; and I grant you
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              four or ſix moneths time to think of an anſwer. </s>
              <s>As to me, it
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              eth that one principle onely may cauſe a plurality of motions in
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                <arrow.to.target n="marg463"/>
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              the Terreſtrial Globe, juſt in the ſame manner that, as I told you
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              before, one onely principle with the help of various inſtruments </s>
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