Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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without diminiſhing or increaſing it according to the preciſe rate
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of its diminiſhing or increaſing in its Veſſel. </
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>Becauſe therefore
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that in the conſervation and retention of the
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impetus
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before
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ceived, the diſobedience to a new augmentation or diminution of
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motion conſiſteth, that moveable that ſhall be moſt apt for ſuch
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a retention, ſhall be alſo moſt commodious to demonſtrate the
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effect that followeth in conſequence of that retention. </
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>Now how
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much the Water is diſpoſed to maintain ſuch a conceived
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tion; though the cauſes ceaſe that impreſs the ſame, the
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ence of the Seas extreamly diſturbed by impetuous Winds
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eth us; the Billows of which, though the Air be grown calm, and
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the Wind laid, for a long time after continue in motion: As the
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Sacred Poet pleaſantly ſings,</
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The anſwer to
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the objections
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made againſt the
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motion of the
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reſtrial Globe.
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+ Corpulenta.</
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The Water more
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apt to conſerve an
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impetus
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conceived,
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then the Air.
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Qual l'alto Egeo,
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&c.----------</
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>And that long continuing rough after a ſtorm, dependeth on
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the gravity of the water: For, as I have elſewhere ſaid, light
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dies are much eaſier to be moved than the more grave, but yet
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are ſo much the leſs apt to conſerve the motion imparted, when
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once the moving cauſe ceaſeth. </
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>Whence it comes that the Aire,
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as being of it ſelf very light and thin, is eaſily mov'd by any very
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ſmall force, yet it is withall very unable to hold on its motion,
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the Mover once ceaſing. </
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>Therefore, as to the Aire which
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rons the Terreſtrial Globe, I would fay, that by reaſon of its
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adherence, it is no leſſe carried about therewith then the Water;
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and eſpecially that part which is contained in its veſſels; which
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veſſels are the valleys encloſed with Mountains. </
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>And we may
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with much more reaſon affirm that this ſame part of the Air is
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carried round, and born forwards by the rugged parts of the
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Earth, than that the higher is whirl'd about by the motion of the
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Heavens, as ye
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Peripateticks
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maintain.</
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Light bodies eaſier
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to be moved than
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beavy, but leſs aut
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to conſerve the
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tion.
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Its more rational
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that the Air be
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commoved by the
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rugged ſurface of
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the Earth than
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by the Celeſtial
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motion.
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>What hath been hitherto ſpoken, ſeems to me a ſufficient
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ſwer to the allega ion of
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Simputius
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; yet nevertheleſs with a new
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inſtance and ſolution, founded upon an admirable experiment, I
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will ſuperabundantly ſatisfie him, and confirm to
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Sagredus
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the
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mobility of the Earth. </
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>I have told you that the Air, and in
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ticular that part of it which aſcendeth not above the tops of the
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higheſt Mountains, is carried round by the uneven parts of the
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Earths ſurface: from whence it ſhould ſeem, that it muſt of
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ſequence come to paſſe, that in caſe the ſuperficies of the Earth
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were not uneven, but ſmooth and plain, no cauſe would remain
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for drawing the Air along with it, or at leaſt for revolving it with
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ſo much uniformity. </
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<
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>Now the ſurface of this our Globe, is not
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all craggy and rugged, but there are exceeding great tracts very </
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