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point of Aries, and counting Eaſtward round the Planisphere, and, with the celeſtial bodies, it is that degree of the Equinoctial that comes to the Meridian with any of them reſpectively; and the Right Aſcenſion of every ſign, degree, and point of the Ecliptic, is to be found the ſame way, by bringing thoſe points reſpectively to the Meridian, and the degree of the Equinoctial cut thereby, is the Right Aſcenſion of that ſign, or point required; and note! that 15° of this circle revolves through the Meridian in every hour, it being the 24th part of 360°, which the whole Circle contains.
Precept 3. Oblique Ascension, and Descension, is the degree of the Equinoctial cut by the Horizon, at the time of the riſing, and ſetting of any of the celeſtial bodies, or of any part of the Ecliptic, as may be required.
Precept 4. Ascensional Difference, is the difference between the Right, and Oblique Aſcenſion; and with the Sun, it ſhows how much it riſes and ſets, before, and after ſix o'clock.
Precept 5. Celestial Longitude is an Arc of the Ecliptic, beginning at the firſt point of Aries; and if the Sun, or any celeſtial object, be in any particular ſign, degree, and minute, as if in 24 degrees, 35 minutes, and 49 ſeconds of Leo—we write it's Longitude thus—4s 24° 35' 49". Obſerve the ſame rule in all other caſes, as required.
