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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>It is not enough,
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Sagredus,
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that the ſubjects be noble
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and great, but the buſineſſe conſiſts in handling it nobly. </
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<
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>And
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who knoweth not, that in the diſſection of the members of
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a beaſt, there may be diſcovered infinite wonders of provident
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and prudent Nature; and yet for one, that the Anatomiſt
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ſects, the butcher cuts up a thouſand. </
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<
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>Thus I, who am now
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ſeeking how to ſatisfie your demand, cannot tell with which of the
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two ſhapes I had beſt to appear on the Stage; but yet, taking
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heart from the example of
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Simplicius,
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his Authour, I will,
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out more delays, give you an account (if I have not forgot) how
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I proceeded. </
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<
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>But before I go any further, I muſt not omit to tell
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you, that I much fear that
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Simplicius
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hath not faithfully related
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the manner how this his Authour found, that the Cannon
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let in coming from the concave of the Moon to the centre of the
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Earth, would ſpend more than fix dayes: for if he had
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ſed that its velocity in deſcending was equal to that of the
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concave (as
<
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Simplicius
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ſaith he doth ſuppoſe) he would have
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ſhewn himſelf ignorant of the firſt, and more ſimple principles
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of
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Geometry
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; yea, I admire that
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Simplicius,
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in admitting the
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ſuppoſition which he ſpeaketh of, doth not ſee the monſtrous
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ſurdity that is couched in it.</
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<
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>SIMP. </
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<
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>Its poſſible that I may have erred in relating it; but
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that I ſee any fallacy in it, I am ſure is not true.</
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<
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>SALV. </
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<
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>Perhaps I did not rightly apprehend that which you
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ſaid, Do you not ſay, that this Authour maketh the velocity
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of the bullet in deſcending equall to that which it had in
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ning round, being in the concave of the Moon, and that
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ming down with the ſame velocity, it would reach to the centre
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in ſix dayes?</
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<
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>SIMP. So, as I think, he writeth.</
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<
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>SALV. </
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>
<
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>And do not you perceive a ſhamefull errour therein?
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</
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<
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>But queſtionleſſe you diſſemble it: For it cannot be, but that
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you ſhould know that the ſemidiameter of the Circle is leſſe than
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the ſixth part of the circumference; and that conſequently, the
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time in which the moveable ſhall paſſe the ſemidiameter, ſhall be
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leſſe than the ſixth part of the time; in which, being moved
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with the ſame velocity, it would paſſe the circumference; and
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that therefore the bullet deſcending with the velocity,
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with it moved in the concave, will arrive in leſſe than four hours
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at the centre, ſuppoſing that in the concave one revolution
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ſhould be conſummate in twenty four hours, as he muſt of
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ceſſity have ſuppoſed it, for to keep it all the way in the ſame
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vertical line.</
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>
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A ſhamefull
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errour in the
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gument taken from
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the bullets falling
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out of the Moons
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concave.
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</
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<
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>SIMP. </
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>
<
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>Now I thorowly perceive the miſtake: but yet I
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would not lay it upon him undeſervedly, for it's poſſible that I </
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</
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</
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>
</
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