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

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              <s>
                <pb xlink:href="040/01/184.jpg" pagenum="166"/>
              as far one way as another. </s>
              <s>Having obſerved all theſe particulars,
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              though no man doubteth that ſo long as the veſſel ſtands ſtill, they
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              ought to ſucceed in this manner; make the Ship to move with
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              what velocity you pleaſe; for (ſo long as the motion is uniforme,
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              and not fluctuating this way and that way) you ſhall not diſcern
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              any the leaſt alteration in all the forenamed effects; nor can you
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              gather by any of them whether the Ship doth move or ſtand ſtill.
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              </s>
              <s>In leaping you ſhall reach as far upon the floor, as before; nor for
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              that the Ship moveth ſhall you make a greater leap towards the
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              poop than towards the prow; howbeit in the time that you ſtaid
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              in the Air, the floor under your feet ſhall have run the contrary way
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              to that of your jump; and throwing any thing to your companion
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              you ſhall not need to caſt it with more ſtrength that it may reach
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              him, if he ſhall be towards the prow, and you towards the poop,
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              then if you ſtood in a contrary ſituation; the drops ſhall all diſtill
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              as before into the inferiour bottle and not ſo much as one ſhall
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              fall towards the poop, albeit whil'ſt the drop is in the Air, the Ship
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              ſhall have run many feet; the Fiſhes in their water ſhall not ſwim
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              with more trouble towards the fore-part, than towards the hinder
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              part of the tub; but ſhall with equal velocity make to the bait
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              placed on any ſide of the tub; and laſtly, the flies and gnats
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              ſhall continue their flight indifferently towards all parts; nor
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              ſhall they ever happen to be driven together towards the ſide of
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              the Cabbin next the prow, as if they were wearied with
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              lowing the ſwift courſe of the Ship, from which through their
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              ſuſpenſion in the Air, they had been long ſeparated; and if
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              burning a few graines of incenſe you make a little ſmoke,
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              you ſhall ſee it aſcend on high, and there in manner of a cloud
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              ſuſpend it ſelf, and move indifferently, not inclining more to one
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              ſide than another: and of this correſpondence of effects the cauſe
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              is for that the Ships motion is common to all the things contained
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              in it, and to the Air alſo; I mean if thoſe things be ſhut up in the
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              Cabbin: but in caſe thoſe things were above deck in the open Air,
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              and not obliged to follow the courſe of the Ship, differences more
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              or leſſe notable would be obſerved in ſome of the fore-named
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              fects, and there is no doubt but that the ſmoke would ſtay behind
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              as much as the Air it ſelf; the flies alſo, and the gnats being
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              dered by the Air would not be able to follow the motion of the
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              Ship, if they were ſeparated at any diſtance from it. </s>
              <s>But keeping
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              neer thereto, becauſe the Ship it ſelf as being an unfractuous
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              brick, carrieth along with it part of its neereſt Air, they would
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              follow the ſaid Ship without any pains or difficulty. </s>
              <s>And for the
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              like reaſon we ſee ſometimes in riding poſt, that the troubleſome
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              flies and ^{*} hornets do follow the horſes flying ſometimes to one,
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                <arrow.to.target n="marg360"/>
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              ſometimes to another part of the body, but in the falling drops </s>
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          </chap>
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