 | John Bonnycastle - 1816 - 490 pages
...to obtain in finding the longitude from lunar observations ; or, which is the same thing, by taking the distance between the sun and moon, or between the moon and some remarkable fixed star. In the first place then it may be observed, that the moon's daily motion... | |
 | Perry Fairfax Nursey - 1830 - 512 pages
...remain, Sir, Your very obedient servant, A. MACKINHOK. Sheffield, August 3, 1829. NEW METHOD OF OBTAINING THE DISTANCE BETWEEN THE SUN AND MOON, OR BETWEEN THE MOON AND A STAR, IN ORDER TO FIND THE bONGITÜDE AT SEA. Sir, — Having been engaged for a series of years in teaching... | |
 | 1830 - 522 pages
...remain, Sir, Your very obedient servant, A. MACKINNON. Sheffield, August 3, 1829. MEW METHOD OF OBTAINING THE DISTANCE BETWEEN THE SUN AND MOON, OR BETWEEN THE MOON AND A STAR, IN ORDEK TO FIND THE LONGITUDE AT SEA. Sir, — Having been engaged for a series of years in teaching... | |
 | David Thomson - 1831 - 316 pages
...Rate of a Chronometer by means of the Lunar Distances. RULE. 1. When there is a good opportunity for observing the distance between the Sun and Moon, or between the Moon and a Star, observe several sets of Distances with the Altitudes of the objects, and note the times by the Chronometer... | |
 | John BRINKLEY (Bishop of Cloyne.) - 1836 - 334 pages
...or sun, as a small error in the distance makes a considerable error in the longitude. The moon moves at the rate of about a degree in two hours, or one minute of • Vid. " Tables requisite to be used with the Nautical Almanac." Mendoia's Treatise on Nautical Astronomy.... | |
 | Denison Olmsted - 1839 - 300 pages
...method ? What is the error of the best tables now in use ? " See Bowditch's Navigator, Tenth Ed. p. 226. hours, or one minute of space in two minutes of time....an error of one minute in observing the distance, we make an errortof two minutes in time, or 30 miles of longitude at the equator. A single observation... | |
 | Denison Olmsted - 1839 - 504 pages
...longitude. The moon moves at the rate of about a degree in two * See Bowditch's Navigator, Tenth Ed. p, 226. hours, or one minute of space in two minutes of time....an error of one minute in observing the distance, we make an error of two minutes in time, or 30 miles of longitude at the equator. A single observation... | |
 | David Thomson (inventor of the longitude scale.) - 1845 - 318 pages
...Rate of a Chronometer by means of the Lunar Distances. RULE. 1. When there is a good opportunity for observing the distance between the Sun and Moon, or between the Moon, and a Planet, or a Star, observe several sets of distances with the Altitudes of the objects, and note the... | |
 | Perry Fairfax Nursey - 1845 - 474 pages
...90° and 180° being negative. The same formula, it is manifest, will apply to the determination of the distance between the sun and moon, or between the moon and a fixed star, when their right ascensions and declinations are known ; so that this problem, when taken... | |
 | 1845 - 516 pages
...90° and 180° being negative. The same formula, it is manifest, will apply to the determination of the distance between the sun and moon,' or between the moon and a fixed star, when their right ascensions and declinations are known; so that this problem, when taken... | |
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What is the error of the best tables now in use ? hours, or one minute of space in two minutes of time. Therefore, if we make an error of one minute in observing the distance, we make an error of two minutes in time, or 30 miles of longitude at the equator.... 
