Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667

Table of figures

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              <s>
                <pb xlink:href="040/01/275.jpg" pagenum="255"/>
              inconcluſiveneſſe at leaſt of the demonſtrations of this Author,
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              firſt propoſed to conſideration, and how both he, and all the
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              Aſtronomers with whom he contendeth, do agree that the new
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              Star had not any motion of its own, and onely went round with
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              the diurnal motion of the
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              primum mobile
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              ; but diſſent about the
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              placing of it, the one party putting it in the Celeſtial Region,
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              that is above the Moon, and haply above the fixed Stars, and
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              the other judging it to be neer to the Earth, that is, under the
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              concave of the Lunar Orb. </s>
              <s>And becauſe the ſituation of the new
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              ſtar, of which we ſpeak, was towards the North, and at no very
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              great diſtance from the Pole, ſo that to us
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              Septentrionals,
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              it did
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              never ſet, it was an eaſie matter with Aſtronomical inſtruments
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              to have taken its ſeveral meridian altitudes, as well its ſmalleſt
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              under the Pole, as its greateſt above the ſame; from the
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              ring of which altitudes, made in ſeveral places of the Earth,
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              ſituate at different diſtances from the North, that is, different
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              from one another in relation to polar altitudes, the ſtars diſtance
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              might be inferred: For if it was in the Firmament amongſt the
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                <arrow.to.target n="marg510"/>
                <lb/>
              other fixed ſtars, its meridian altitudes taken in divers elevations
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              of the pole, ought neceſſarily to differ from each other with the
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              ſame variations that are found amongſt thoſe elevations
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              ſelves; that is, for example, if the elevation of the ſtar above
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              the horizon was 30 degrees, taken in the place where the polar
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              altitude was
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              v. </s>
              <s>gr.
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              45 degrees, the elevation of the ſame ſtar
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              ought to have been encreaſed 4 or 5 degrees in thoſe more
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              thernly places where the pole was higher by the ſaid 4 or 5
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              grees. </s>
              <s>But if the ſtars diſtance from the Earth was but very little,
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              in compariſon of that of the Firmament; its meridian altitudes
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              ought approaching to the North to encreaſe conſiderably more
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              than the polar altitudes; and by that greater encreaſe, that is,
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              by the exceſſe of the encreaſe of the ſtars elevation, above the
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              encreaſe of the polar elevation (which is called the difference of
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              Parallaxes) is readily calculated with a cleer and ſure method,
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              the ſtars diſtance from the centre of the Earth. </s>
              <s>Now this Author
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              taketh the obſervations made by thirteen Aſtronomers in ſundry
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              elevations of the pole, and conferring a part of them at his
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              ſure, he computeth by twelve collations the new ſtars height to
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              have been alwayes beneath the Moon; but this he adventures to
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              do in hopes to find ſo groſſe ignorance in all thoſe, into whoſe
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              hands his book might come, that to ſpeak the truth, it hath turn'd
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              my ſtomack; and I wait to ſee how thoſe other Aſtronomers, and
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              particularly
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              Kepler,
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              againſt whom this Author principally
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              veigheth, can contein themſelves in ſilence, for he doth not uſe
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              to hold his tongue on ſuch occaſions; unleſſe he did poſſibly
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              think the enterprize too much below him. </s>
              <s>Now to give you to </s>
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