Brocklesby, John, 1811-1889. [from old catalog] · New York, Sheldon and company · leaf 353
ection of figure 20. Prob. The suns right ascension being 243° 44 36, andits declination 21° 16 4; what is its longitude? The right ascension being more than 180°, shows that theproblem is in the third quadrant, and 243° 44 36—180=63° 44 36 =ED. The value of EA, as found by Napiersrule, is 65° 39… … In figure 2, let the circle NPMOE be the meridian ofthe place, HO the horizon, and EQ the equator. P is theelevated pole of the heavens, and S the place of the sunwhen on the horizon. MSN the apparent path the sundescribes between midnight and noon, for it is evident thatwhen the sun is at N it is…
Astronomy
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