An introduction to astronomy : designed as a text book for the students of Yale College (1846)
Olmsted, Denison, 1791-1859, Yale College (1718-1887) · New York : Collins, Brother & Co. · leaf 86
Os semi-diameter, . . 0 15 51 Subtract Refraction, Add Parallax, True altitude Os center, . 49° 25 08 Ex. 2. With the Artificial Horizon.Altitude of os upper limb above the image in the artificial ho-rizon, 100° 2 47. True altitude, 50° 0123.5 Os semi-diameter, . . . 00 15 50. 49° 45… … 132. Given the sun^s Right Ascension and Declination, to findhis Longitude and the Obliquity of the Ecliptic. Let PCP (Fig. 20,) represent the celestial meridian that passesthrough the first of Cancer and Capricorn, (the solstitial colure,)PP the axis of thesphere, EQ the equator, EC the ecliptic,…
Astronomy
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