Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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following the birds flight with the piece, is his ſomewhat
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ting it, taking his aim before it; as alſo his ſhooting (as I believe)
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not with one bullet, but with many ſmall balls (called ſhot) the
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which ſcattering in the air poſſeſs a great ſpace; and alſo the
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treme velocity wherewith theſe ſhot, being diſcharged from the
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Gun, go towards the bird.</
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<
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>SALV. </
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>See how far the winged wit of
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Sagredus
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anticipateth,
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and out-goeth the dulneſs of mine; which perhaps would have
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light upon theſe diſparities, but not without long ſtudie. </
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>Now
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turning to the matter in hand, there do remain to be conſidered
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by us the ſhots at point blank, towards the Eaſt and towards the
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Weſt; the firſt of which, if the Earth did move, would always
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happen to be too high above the mark, and the ſecond too low;
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foraſmuch as the parts of the Earth Eaſtward, by reaſon of the
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urnal motion, do continually deſcend beneath the tangent paralel
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to the Horizon, whereupon the Eaſtern ſtars to us appear to aſcend;
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and on the contrary, the parts Weſtward do more and more
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cend, whereupon the Weſtern ſtars do in our ſeeming deſcend:
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and therefore the ranges which are leveled according to the ſaid
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tangent at the Oriental mark, (which whilſt the ball paſſeth
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along by the tangent deſcendeth) ſhould prove too high, and the
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Occidental too low by means of the elevation of the mark, whilſt
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the ball paſſeth along the tangent. </
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<
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>The anſwer is like to the reſt:
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for as the Eaſtern mark goeth continually deſcending, by reaſon
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of the Earths motion, under a tangent that continueth
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able; ſo likewiſe the piece for the ſame reaſon goeth continually
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inclining, and with its mounture purſuing the ſaid mark: by
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which means the ſhot proveth true.</
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The anſwer to the
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Argument taken
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from the ſhots at
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point blanck
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wards the Eaſt &
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Weſt.
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>But here I think it a convenient opportunity to give notice of
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certain conceſſions, which are granted perhaps over liberally by
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the followers of
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Copernicus
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unto their Adverſaries: I mean of
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yielding to them certain experiments for ſure and certain, which
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yet the Adverſaries themſelves had never made tryal of: as for
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example, that of things falling from the round-top of a ſhip whilſt
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it is in motion, and many others; amongſt which I verily believe,
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that this of experimenting whether the ſhot made by a Canon
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wards the Eaſt proveth too high, and the Weſtern ſhot too low,
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is one: and becauſe I believe that they have never made tryal
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thereof, I deſire that they would tell me what difference they
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think ought to happen between the ſaid ſhots, ſuppoſing the Earth
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moveable, or ſuppoſing it moveable; and let
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Simplieius
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for this
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time anſwer for them.</
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The followers of
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Copernicus too
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freely admit
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tain propoſitions for
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true, which are
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very doubtfull.
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<
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<
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more intelligent perhaps might do; but ſhall ſpeak what thus upon
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the ſudden I think they would reply; which is in effect the ſame </
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