Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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ſpake not friendly, when you ſaid you did not know that ſame
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fallacy which you now confeſſe that you know very well.</
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<
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>SAGR. </
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>The very confeſſion of knowing it may aſſure you
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that I did not diſſemble, when I ſaid that I did not underſtand it;
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for if I had had a mind, and would diſſemble, who could
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der me from continuing in the ſame ſimulation, and denying ſtill
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that I underſtand the fallacy? </
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<
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>I ſay therefore that I underſtood
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not the ſame, at that time, but that I do now at this preſent
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prehend it, for that you have prompted my intellect, firſt by
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telling me reſolutely that it is
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null,
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and then by beginning to
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queſtion me ſo at large what thing that might be, whereby I
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might come to know the ſtation and retrogradation of the
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nets; and becauſe this is known by comparing them with the
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ed ſtars, in relation to which, they are ſeen to vary their
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tions, one while towards the Weſt, and another towards the
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Eaſt, and ſometimes to abide immoveable; and becauſe there
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is not any thing above the Starry Sphere, immenſely more remote
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from us, and viſible unto us, wherewith we may compare our
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fixed ſtars, therefore we cannot diſcover in the fixed ſtars any
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foot-ſteps of what appeareth to us in the Planets. </
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<
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>This I believe
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is the ſubſtance of that which you would force from me.</
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The ſtation,
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rection and
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gradation of the
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Planets is known,
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in relation to the
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fixed ſtars.
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<
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>SALV. </
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>It is ſo, with the addition moreover of your
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rable ingenuity; and if with half a word I did open your eyes,
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you by the like have remembred me that it is not altogether
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poſſible, but that ſometime or other ſomething obſervable may
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be found amongſt the fixed ſtars, by which it may be gathered
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wherein the annual converſion reſides, ſo as that they alſo no
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leſſe than the Planets and Sun it ſelf, may appear in judgment to
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bear witneſſe of that motion, in favour of the Earth; for I do not
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think that the ſtas are ſpread in a ſpherical ſuperficies equally
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mote from a common centre, but hold, that their diſtances from
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us are ſo various, that ſome of them may be twice and thrice as
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remote as others; ſo that if with the Teleſcope one ſhould
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ſerve a very ſmall ſtar neer to one of the bigger, and which
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therefore was very exceeding high, it might happen that ſome
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ſenſible mutation might fall out between them, correſpondent
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to that of the ſuperiour Planets. </
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<
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>And ſo much ſhall ſerve to have
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ſpoken at this time touching the ſtars placed in the Ecliptick.
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Let us now come to the fixed ſtars, placed out of the Ecliptick,
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and let us ſuppoſe a great circle erect upor [
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i. </
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<
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>e. </
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<
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>at right angles
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to
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] the Plane of the ^{*} ſame; and let it, for example, be a cir
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cle that in the Starry Sphere anſwers to the Solſtitial Colure,
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and let us mark it C E H [
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in Fig.
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8.] which ſhall happen to be
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withal a Meridian, and in it we will take a ſtar without the
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tick, which let be E. </
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<
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>Now this ſtar will indeed vary its </
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