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

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              ſon of its great reſiſtance to the diviſion made by the hull of the
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              ſhip, doth with great noiſe reſiſt the ſame; nor doth it permit it
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              of a great while to acquire that velocity which the wind would
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              confer upon it, were the obſtacle of the water removed. </s>
              <s>
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              haps
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              Simplicius
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              you have never conſidered with what fury the
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              water beſets a bark, whil'ſt it forceth its way through a ſtanding
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              water by help of Oars or Sails: for if you had ever minded that
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              effect, you would not now have produced ſuch an abſurdity.
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              </s>
              <s>And I am thinking that you have hitherto been one of thoſe who
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              to find out how ſuch things ſucceed, and to come to the
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              ledg of natural effects, do not betake themſelves to a Ship, a
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              Croſſe-bow, or a piece of Ordinance, but retire into their
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              dies, and turn over Indexes and Tables to ſee whether
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              Aristotle
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              hath ſpoken any thing thereof, and being aſſured of the true
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              ſenſe of the Text, neither deſire nor care for knowing any
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            <p type="margin">
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              The great
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              city for which they
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              are much to be
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              vied who perſwade
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              themſelves that
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              they know every
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              thing.
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              </s>
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            <p type="main">
              <s>SAGR. </s>
              <s>This is a great felicity, and they are to be much
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              vied for it. </s>
              <s>For if knowledg be deſired by all, and if to be wiſe,
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              be to think ones ſelf ſo, they enjoy a very great happineſſe, for
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              that they may perſwade themſelves that they know and underſtand
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              all things, in ſcorn of thoſe who knowing, that they underſtand
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              not what theſe think they underſtand, and conſequently ſeeking
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              that they know not the very leaſt particle of what is knowable,
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              kill themſelves with waking and ſtudying, and conſume their days
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              in experiments and obſervations. </s>
              <s>But pray you let us return to
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              our birds; touching which you have ſaid, that the Air being
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              ved with great velocity, might reſtore unto them that part of the
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              diurnal motion which amongſt the windings of their flight they
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              might have loſt; to which I reply, that the agitated Air ſeemeth
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              unable to confer on a ſolid and grave body, ſo great a velocity as
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              its own: And becauſe that of the Air is as great as that of the
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              Earth, I cannot think that the Air is able to make good the loſſe
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              of the birds retardation in flight.</s>
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              <s>SALV. </s>
              <s>Your diſcourſe hath in it much of probability, and to
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              ſtick at trivial doubts is not for an acute wit; yet nevertheleſſe the
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              probability being removed, I believed that it hath not a jot more
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              force than the others already conſidered and reſolved.</s>
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              <s>SAGR. </s>
              <s>It is moſt certain that if it be not neceſſatily
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              dent, its efficacy muſt needs be juſt nothing at all, for it is
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              onely when the concluſion is neceſſary that the opponent hath
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              thing to alledg on the contrary.</s>
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            <p type="main">
              <s>SALV. </s>
              <s>Your making a greater ſcruple of this than of the other
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              inſtances dependeth, if I miſtake not, upon the birds being
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              mated, and thereby enabled to uſe their ſtrength at pleaſure
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              gainſt the primary motion in-bred in terrene bodies: like as for </s>
            </p>
          </chap>
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