Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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And firſt, I ask you, whether the Aſtronomers, in obſerving with
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their Inſtruments, and ſeeking
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v. </
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<
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>gr.
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how great the elevation of a
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Star is above the Horizon, may deviate from the truth, aſwell in
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making it too great, as too little; that is, may erroneouſly
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pute, that it is ſometime higher than the truth, and ſometimes
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er; or elſe whether the errour muſt needs be alwayes of one
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kinde, to wit, that erring they alwayes make it too much, and
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ver too little, or alwayes too little, and never too much?</
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>SIMP. </
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>I doubt not, but that it is as eaſie to commit an errour
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the one way, as the other.</
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>SALV. </
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>I believe the Author would anſwer the ſame. </
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>Now of
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theſe two kinds of errours, which are contraries, and into which the
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obſervators of the new ſtar may equally have fallen, applied to
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calculations, one ſort will make the ſtar higher, and the other lower
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than really it is. </
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>And becauſe we have already agreed, that all
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the obſervations are falſe; upon what ground would this
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thor have us to accept thoſe for moſt congruous with the truth,
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that ſhew the ſtar to have been near at hand, than the others that
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ſhew it exceſſively remote?</
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>SIMP. </
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>By what I have, as yet, collected of the Authors mind,
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I ſee not that he doth refuſe thoſe obſervations, and indagations
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that might make the ſtar more remote than the Moon, and alſo
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than the Sun, but only thoſe that make it remote (as you your ſelf
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have ſaid) more than an infinite diſtance; the which diſtance,
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cauſe you alſo do refuſe it as impoſſible, he alſo paſſeth over, as
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being convicted of infinite falſhood; as alſo thoſe obſervations
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are of impoſſibility. </
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>Methinks, therefore, that if you would
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vince the Author, you ought to produce ſupputations, more exact,
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or more in number, or of more diligent obſervers, which conſtitute
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the ſtar in ſuch and ſuch a diſtance above the Moon, or above the
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Sun, and to be brief, in a place poſſible for it to be in, like as he
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produceth theſe twelve, which all place the ſtar beneath the Moon
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in places that have a being in the world, and where it is poſſible for
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it to be.</
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>SALV. </
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>But
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Simplicius
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yours and the Authors Equivocation
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lyeth in this, yours in one reſpect, and the Authors in another; I
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diſcover by your ſpeech that you have formed a conceit to your
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ſelf, that the exorbitancies that are commited in the eſtabliſhing
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the diſtance of the Star do encreaſe ſucceſſively, according to the
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proportion of the errors that are made by the Inſtrument, in
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ing the obſervations, and that by converſion, from the greatneſs
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of the exorbitancies, may be argued the greatneſſe of the error;
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and that thereforefore hearing it to be infered from ſuch an
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vation, that the diſtance of the ſtar is infinite, it is neceſſary, that
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the errour in obſerving was infinite, and therefore not to be </
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