192 Mathematical Elements

Book

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the Circle B h, which touches the Horizon,has no Part of it below the Horizon.

Bodies less distant from the Pole do notmuch as come down to the Horizon. :

1136 It appears by the fame Reasoning, that Bo& ^

whose Distance from the opposite Pole does not e^ ethe Height of the- Pole , never rise above the H 0zon, and are always invisible,

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1137 Bodies whose Distance E Z from the Equais equal to the Height of the Pole, go thro'Zenith Z; for E Z is equal to the Latitudethe Place to which the Height of the Pol eequal *. c h3 s

Plate XXIII. Fig. 5.] When a Speffiator S ^receded as far as he can from the Pole, he fj? ,to the Equator , whose Points are equally didfrom each Pole* ; then the Axis Pp is in the Idrizon, with which the Equator makes a right p ^gle *, for which reason the Horizon is said ^right t or this is called a right Sphere. j,g

The Horizon cuts into two equal Parts au . |,Circles that are parallel to the Equator,are represented by the Lines A a, B b ; there; ^all the heavenly Bodies , at every Revolution °J ^Earth , rife and set , and are visible and invifiw 1 .ring equal Eimes.

Ehe Æquator itself goes thro ’ the Zeniths Jatherefore all'the Bodies that are in it pass thro’ d

*1126

1138

*1075i 114

*io7S

1114

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1140

If what we have explain’d concerning the ^ fthal Motion j be applied to the Bodies ofother apparent Motions we have spoken be ^the Phænomena will be easily determin’d t athe Motions join’d together ; those that relithe Sun are more remarkable than the rei »therefore more particularly to be explain^*