Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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<
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>SALV. </
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<
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>Rather how improper, for being by its tranſparence,
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wholly inviſible, a man would not be able without ſtumbling at
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the threſholds, and breaking his head againſt the Walls, to paſs
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from room to room.</
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<
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>SAGR. </
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<
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>This danger would not befall him, if it be true, as ſome
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Peripateticks
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ſay, that it is intangible: and if one cannot
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touch it, much leſs can it hurt him.</
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The ſubstance of
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Heaven
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ble.
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<
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<
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>This would not ſerve the turn, for though the matter
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of the Heavens cannot be toucht, as wanting tangible qualities:
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yet may it eaſily touch the elementary bodies; and to offend us
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it is as ſufficient that it ſtrike us, nay worſe, than if we ſhould
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ſtrike it. </
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<
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>But let us leave theſe
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Pallaces,
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or, to ſay better, theſe
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Caſtles
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in the air, and not interrupt
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Simplicius.
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<
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>SIMPL. </
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>The queſtion which you have ſo caſually ſtarted, is one
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of the moſt difficulty that is diſputed in Philoſophy; and I have
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on that ſubject moſt excellent conceits of a very learned Doctor
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of
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Padoua,
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but it is not now time to enter upon them. </
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<
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>Therefore
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returning to our purpoſe, I ſay that the Moon, in my opinion, is
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much more ſolid than the Earth, but do not infer the ſame, as you
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do, from the craggineſs and montuoſity of its ſuperficies; but
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rather from the contrary, namely, from its aptitude to receive (as
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we ſee it experimented in the hardeſt ſtones) a poliſh and luſtre
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exceeding that of the ſmootheſt glaſs, for ſuch neceſſarily muſt
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its ſuperficies be, to render it apt to make ſo lively reflection of
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the Suns rays. </
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<
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>And for thoſe appearances which you mention,
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of Mountains, Cliffs, Hills, Valleys,
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&c.
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they are all illuſions:
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and I have been preſent at certain publick diſputes, where I have
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heard it ſtrongly maintained againſt theſe introducers of novelties,
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that ſuch appearances proceed from nothing elſe, but from the
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equal diſtribution of the opacous and perſpicuous parts, of which
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the Moon is inwardly and outwardly compoſed: as we ſee it
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often fall out in chryſtal, amber, and many other precious ſtones
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of perfect luſtre; in which by reaſon of the opacity of ſome parts,
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and the tranſparency of others, there doth appear ſeveral
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vities and prominencies. </
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<
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>In the fourth reſemblance, I grant, that
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the ſuperficies of Terreſtrial Globe beheld from afar, would make
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two different appearances, namely, one more clear, the other more
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dark; but I believe that ſuch diverſity would ſucceed quite
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trary to what you ſay; that is, I hold that the ſurface of the
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ter would appear lucid, becauſe that it is ſmooth and tranſparent;
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and that of the Earth would appear obſcure, by reaſon of its
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pacity and ſcabroſity, ill accommodated for reflecting the light of
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the Sun. </
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<
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>Concernïng the fifth compariſon, I grant it wholly, and
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am able, in caſe the Earth did ſhine as the Moon, to ſhow the
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ſame to any one that ſhould from thence above behold it, </
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