Galilei, Galileo
,
The systems of the world
,
1661
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of the Sun capable to penetrate the ſubſtance of the Moon, he
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makes her in part diaphanous, as is
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v. </
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<
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>g.
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the tranſparence of a cloud,
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or cryſtal: but I know not what he would think of ſuch a
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ſparency, in caſe the ſolar rayes were to paſſe a depth of clouds
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of above two thouſand miles; but let it be ſuppoſed that he
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ſhould boldly anſwer, that might well be in the Cœleſtial, which
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are quite other things from theſe our Elementary, impure, and
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feculent bodies; and let us convict his error by ſuch wayes, as
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admit him no reply, or (to ſay better) ſubter-fuge. </
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<
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>If he will
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maintain, that the ſubſtance of the Moon is diaphanous, he
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muſt ſay that it is ſo, whileſt that the rayes of the Sun are to
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netrate its whole profundity, that is, more than two thouſand
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miles; but that if you oppoſe unto them onely one mile, or
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leſſe, they ſhould no more penetrate that, than they penetrate
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one of our mountains.</
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The Moons
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cus
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in a ſolar
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clipſe can be ſeen
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onely by privation.
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The Author of the
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Book of
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ons, accommodates
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the things to his
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purpoſes, and not
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his purpoſes to the
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things.
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<
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>SAGR. </
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<
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>You put me in mind of a man, who would have ſold
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me a ſecret how to correſpond, by means of a certain ſympathy of
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magnetick needles, with one, that ſhould be two or three
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ſand miles diſtant; and I telling him, that I would willingly buy
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the ſame, but that I deſired firſt to ſee the experiment thereof,
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and that it did ſuffice me to make it, I being in one Chamber, and
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he in the next, he anſwered me, that in ſo ſmall a diſtance one
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could not ſo well perceive the operation; whereupon I turn'd him
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going, telling him, that I had no mind, at that time, to take a
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journey unto
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Grand Cairo,
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or to
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Muſcovy,
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to make the
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ment; but that, if he would go himſelf, I would perform the
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other part, ſtaying in
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Venice.
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But let us hear whither the
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ction of our Author tendeth, and what neceſſity there is, that he
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muſt grant the matter of the Moon to be moſt perforable by the
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rayes of the Sun, in a depth of two thouſand miles, but more
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opacous than one of our mountains, in a thickneſſe of one mile
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onely.</
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A jeſt put upon one
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that would ſell a
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certain ſecret for
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holding
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dency with a perſon
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a thouſand miles
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off
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<
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>SALV. </
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>The very mountains of the Moon themſelves are a
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proof thereof, which percuſſed on one ſide of the Sun, do caſt
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on the contrary ſide very dark ſhadows, terminate, and more
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ſtinct by much, than the ſhadows of ours; but had theſe
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tains been diaphanous, we could never have come to the
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ledg of any unevenneſſe in the ſuperficies of the Moon, nor have
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ſeen thoſe luminous montuoſities diſtinguiſhed by the terms which
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ſeparate the lucid parts from the dark: much leſſe, ſhould we ſee
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this ſame term ſo diſtinct, if it were true, that the Suns light did
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penetrate the whole thickneſſe of the Moon; yea rather,
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ing to the Authors own words, we ſhould of neceſſity diſcern the
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paſſage, and confine, between the part of the Sun ſeen, and the
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part not ſeen, to be very confuſed, and mixt with light and </
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