Then, if the zenith distance and declination be both north or both south, add them together; but if one be north and the other south, subtract the less from the greater, and the sum or difference will be the latitude, of the same name with the greater.*... A complete epitome of practical navigation - Page 161by John William Norie - 1839Full view - About this book
| Olinthus Gilbert Gregory - 1802 - 590 pages
...declination are boih north, or both soit/fi, add them together ; but if one be north , and the other Jbitt/i, subtract the less from the greater, and the sum or...be the latitude, of the same name with the greater. The truth of this rule may be shewn by referring to fig. 7, PI. I. where HR, EQ, and Z, represent as... | |
| Daniel Defoe - 1815 - 610 pages
...the time of observation, but south, if it was south of the sun. If the sun's zenith distance, and its declination, be. both north or both south, add them...the other south, subtract the less from the greater quantity, and the result of such operation will be the geographical position required, being of the... | |
| Daniel Defoe - 1815 - 602 pages
...time of observation, but south, if it was south of the sun. If the sun's senitli distance, aud its declination, be both north or both south, add them...but if one be north, and the other south, subtract thf less from the greater quautity, and the result of such operation will be the geographical position... | |
| Charles Hutton - Astronomy - 1815 - 686 pages
...of the same name' with the two given latitudes. But if the latitudes be of different names, the one north and the other south ; subtract the less from the greater, and divide the remainder by 2, so shall the quotient be the middle latititude, of the same name with the... | |
| Edward Bruce (bookseller.) - 1821 - 418 pages
...zenith distance, which ii north, if the zenith be north of the sun; or south, if it be the contrary. 2. If the zenith distance and declination be both north...the sum or difference will be the latitude of the tame name with the greater. EXAMPLES. 1. Observed the sun's meridian altitude on the 18th of May, and... | |
| David Thomson - Longitude - 1831 - 316 pages
...constella0on is near the meridian below the Pole. 11 2. Find the Declination of the Star by Table L Then if the Zenith Distance and Declination be both North, or both South, add them together, the sum will be the Latitude, of the same Name with the Declination ; but if one be North and the other... | |
| John William Norie - Nautical astronomy - 1836 - 510 pages
...North or South, according as the observer is north or south of the star at the time of observation. 3. Then, if the zenith distance and declination be both...be the latitude, of the same name with the greater. EXAMPLE I. EXAMPLE II. January 24, 1836, about 8 o'clock in the July 16, 1845, atiout 3 o'clock in... | |
| John William Norie - 1840 - 184 pages
...the star at the time of observation. Take the star's declination from Table XIV., and reduce it to the time of observation.* Then, if the zenith distance...be the latitude, of the same name with the greater. * The right ascensions and declinations of the stars contained in Table XIV. being computed for the... | |
| Olinthus Gilbert Gregory - 1841 - 232 pages
...sun at the time of observation. If the zenith distance and the sun's declination be of the same name, add them together ; but if one be north and the other...less from the greater ; and the sum, or difference of the same name with the greater, will be the latitude required. Example. — The height of the observer's... | |
| David Thomson (inventor of the longitude scale.) - 1845 - 318 pages
...observed. 2. Find the declination of the Star by the Table of Fixed Stars, p. 432, Nautical Almanac. Then if the zenith distance and declination be both North, or both South, add them together, the sum will be the latitude of the same name with the declination ; but if one be North and the other... | |
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