Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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incavity one may form Spheres of ſeveral magnitudes. </
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>But what
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is required to the making of an Horſe, or (as you ſay) of a
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hopper, I leave to you to judge, who know that there are but few
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ſtatuaries in the world able to undertake ſuch a piece of work.
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<
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Simplicius
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will not diſſent from me.</
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The Sphericall
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Figure is eaſier to
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be made than any
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other.
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The circular
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gure only is placed
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amongst the
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lata
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of
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ticians.
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* Demands or
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Petitions.</
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Sphericall
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gures of ſundry
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magnitudes may
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be made with one
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onely inſtrument.
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>SIMP. </
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>I know not whether I do at all diffent from you; my
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opinion is this, that none of the afore-named figures can be
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fectly obteined; but for the approaching as neer as is poſſible to
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the moſt perfect degree, I believe that it is incomparably more
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ſie to reduce the Solid into a Spherical figure, than into the ſhape
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of an Horſe, or Graſſe-hopper?</
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<
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>SAGR. </
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>And this greater difficulty, wherein think you doth it
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depend?</
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>SIMP. </
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>Like as the great facility in forming the Sphere ariſeth
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from its abſolute ſimplicity and uniformity ſo the great
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larity rendereth the conſtruction of all other figures difficult.</
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Irregular forms
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difficult to be
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troduced.
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<
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>SAGR. </
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<
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>Therefore the irregularity being the cauſe of the
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culty, than the figure of a ſtone broken with an hammer by
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chance, ſhall be one of the figures that are difficult to be
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ced, it being perhaps more irregular than that of the horſe?</
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>SIMP. </
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>So it ſhould be.</
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<
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>SAGR. </
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>But tell me; that figure what ever it is which the ſtone
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hath, hath it the ſame in perfection, or no?</
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<
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>SIMP. </
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>What it hath, it hath ſo perfectly, that nothing can be
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more exact.</
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>SAGR. Then, if of figures that are irregular, and
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ly hard to be procured, there are yet infinite which are moſt
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fectly obteined, with what reaſon can it be ſaid, that the moſt
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ſimple, and conſequently the moſt eaſie of all, is impoſſible to be
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procured?</
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<
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>SALV. Gentlemen, with your favour, I may ſay that we have
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ſallied out into a diſpute not much more worth than the wool of a
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goat; and whereas our argumentations ſhould continually be
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verſant about ſerious and weighty points, we conſume our time in
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frivolous and impertinent wranglings. </
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<
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>Let us call to minde, I pray
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you, that the ſearch of the worlds conſtitution, is one of the
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teſt and nobleſt Problems that are in nature; and ſo much the
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greater, inaſmuch as it is directed to the reſolving of that other;
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to wit, of the cauſe of the Seas ebbing and flowing, enquired
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to by all the famous men, that have hitherto been in the world,
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and poſſibly found out by none of them. </
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<
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>Therefore if we have
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nothing more remaining for the full confutation of the argument
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taken from the Earths
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vertigo,
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which was the laſt, alledged to
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prove its immobility upon its own centre, let us paſſe to the
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amination of thoſe things that are alledged for, and againſt the
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Annual Motion.
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