Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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dayes, or thereabouts, the ſole annual motion of the Earth
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tween
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Mars
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and
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Venus,
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cauſeth the apparent inequalities in all </
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the five ſtars before named. </
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>And for a facile and full
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ſtanding of the whole, I will deſcribe this figure of it. </
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fore ſuppoſe the Sun to be placed in the centre O, about which
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we will draw the Orb deſcribed by the Earth, with the
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nual motion B G M, and let the circle deſcribed,
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v. </
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by
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Jupiter
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about the Sun in 12. years, be this BGM, and in the
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ſtarry ſphere let us imagine the Zodiack Y V S. Again, in the
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annual Orb of the Earth let us take certain equal arches, B C,
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C D, E F, F G, G H, H I, I K, K L, L M, and in the Sphere
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of
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Jupiter
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let us make certain other arches, paſſed in the ſame
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times in which the Earth paſſeth hers, which let be B C, C D,
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D E, E F, F G, G H, H I, I K, K L, L M, which ſhall each be
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proportionally leſſe than theſe marked in the Earths Orb, like
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as the motion of
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Jupiter
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under the Zodiack is ſlower than the
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annual. </
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Jupiter
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is
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in B, it ſhall appear to us in the Zodiack to be in P, deſcribing </
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