Galilei, Galileo
,
The systems of the world
,
1661
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velocity, no imaginable diverſity could be found either in this,
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or any other experiment whatſoever, as I am anon to tell you.
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<
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>Now if in this caſe there appeareth no difference at all, what can
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be pretended to be ſeen in the ſtone falling from the top of the
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Tower, where the motion in gyration is not adventitious, and
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cidental, but natural and eternal; and where the air exactly
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loweth the motion of the Tower, and the Tower that of the
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reſtrial Globe? </
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<
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>have you any thing elſe to ſay,
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Simplicius,
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upon
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this particular?</
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<
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>SIMP. </
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<
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>No more but this, that I ſee not the mobility of the
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Earth as yet proved.</
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<
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>SALV. </
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<
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>Nor have I any intention at this time, but onely to
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ſhew, that nothing can be concluded from the experiments
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ed by our adverſaries for convincing Arguments: as I think I
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ſhall prove the others to be.</
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<
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>SAGR. </
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<
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>I beſeech you,
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Salviatus,
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before you proceed any
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ther, to permit me to ſtart certain queſtions, which have been
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rouling in my fancy all the while that you with ſo much patience
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and equanimity, was minutely explaining to
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Simplicius
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the
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riment of the Ship.</
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>We are here met with a purpoſe to diſpute, and it's fit
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that every one ſhould move the difficulties that he meets withall,
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for this is the way to come to the knowledg of the truth.
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<
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>Therefore ſpeak freely.</
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<
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>SAGR. </
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<
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>If it be true, that the
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impetus
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wherewith the ſhip moves,
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doth remain indelibly impreſſ'd in the ſtone, after it is let fall from
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the Maſt; and if it be farther true, that this motion brings no
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pediment or retardment to the motion directly downwards,
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tural to the ſtone: it's neceſſary, that there do an effect enſue of
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a very wonderful nature. </
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<
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>Let a Ship be ſuppoſed to ſtand ſtill,
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and let the time of the falling of a ſtone from the Maſts Round-top
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to the ground, be two beats of the pulſe; let the Ship afterwards
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be under ſail, and let the ſame ſtone depart from the ſame place,
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and it, according to what hath been premiſed, ſhall ſtill take up
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the time of two pulſes in its fall, in which time the ſhip will have
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run, ſuppoſe, twenty yards; To that the true motion of the ſtone
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will be a tranſverſe line, conſiderably longer than the firſt ſtraight
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and perpendicular line, which is the length of the ^{*} Maſt, and yet
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nevertheleſs the ^{*} ſtone will have paſt it in the ſame time. </
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<
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>Let
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it be farther ſuppoſed, that the Ships motion is much more
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rated, ſo that the ſtone in falling ſhall be to paſs a tranſverſe line
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much longer than the other; and in ſum, increaſing the Ships
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locity as much as you will, the falling ſtone ſhall deſcribe its
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verſe lines ſtill longer and longer, and yet ſhall paſs them all in
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thoſe ſelf ſame two pulſes. </
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<
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>And in this faſhion, if a Canon were </
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