Page:Description and Use of a New Celestial Planisphere.pdf/23

18 Precept 6. , is an Arc of a great Circle, interecting the Ecliptic at right angles, and paing through the Poles thereof; that on the North ide of the Ecliptic is called North Latitude, and the other ide South.

Precept 7. are Vertical Circles, paing through the Zenith and Nadir, interecting the Horizon at right Angles, and counted from the South, and North, towards the Eat and Wet, or it is an Arc of the Horizon, intercepted between the North, or South Points, and the place where any celestial body ries or ets.

Precept 8. , is an Arc of the Horizon, intercepted between the East or West Points, and that Point where the object ries or ets; and note! you will find the degrees of the Azimuths, and Amplitudes on the Horizon of the Index to the Planisphere; the degree of Amplitude at riing, is called Amplitude Ortive, and Occaive at etting, which mut be denominated, whether it be North, or South.

Precept 9. , or, is when a Star or Planet ries or ets when the Sun doth.

Precept 10. , and, is when a Star, or other object ries, when the Sun ets, or ets when the Sun ries.

Precept 11. ,