 | Robert Gibson - Surveying - 1811 - 580 pages
...Variation qf the Com/lass by an Azimuth. RULE.I. — Reduce the Sun's declination to the time and place of observation, and compute the true altitude of the...90°, when they are of contrary names ; and the sum, or remainder, will be the Sun's polar distance. 3. Add together the Sun's polar distance, the latitude... | |
 | Robert Gibson - Surveying - 1814 - 558 pages
...the Comfiaas 6y an Azimuth » • ' RULE. 1. — Reduce the Sun's declination to the time and place of observation, and compute the true altitude of the...90*, when they are of contrary names ; and the sum, or remainder, will be the Sun's polar distance. , 3. Add together the Sun's polar distance, the latitude... | |
 | John William Norie - Nautical astronomy - 1836 - 510 pages
...of the following methods. METHOD I. 1 . Subtract the sun's declination from 90°, when the latilude and declination are of the same name ; or add it to...90° when they are of contrary names ; and the sum or remainder will be the sun's polar distance. 2. Add together the sun's true altitude, the polar distance,... | |
 | George Coleman (F.R.A.S.) - 1846 - 488 pages
...Nautical Almanac for 1848, from pages 268 to 435. See Rules and Examples on these Subtract the planet's declination from 90° when the latitude and declination are of the same name, but add it to 90Э when they have contrary names, the sum or remainder will be the planet's polar distance.... | |
 | John William Norie - Nautical astronomy - 1852 - 844 pages
...declination (XXI.) taken from Table X., or the Nautical Almanac : compute also the sun's true altitude. 2. Subtract the sun's declination from 90°, when...90°, when they are of contrary names ; and the sum, or remainder, will be the sun's polar distance. 3. Add together the sun's true altitude, the latitude... | |
 | James Sedgwick (sailor.) - Merchant mariners - 1853 - 94 pages
...if the careless navigator would always bear the following in mind, no mistake could ever occur,— " subtract the sun's declination from 90°, when the latitude and declination are of the same name." This is part of the rule given in epitomes, and if a man frequently repeats it mentally when working... | |
 | George Frederick Chambers - Astronomy - 1867 - 888 pages
...FIND THE TIME. The following1 convenient method for determining the time is given by Norie : — " I. Subtract the Sun's declination from 90° when the...90° when they are of contrary names, and the sum or remainder will be the Sun's pblar distance. " 2. Add together the Sun's altitude, the polar distance,... | |
 | William C. Seaton - Merchant mariners - 1875 - 298 pages
...page II of the Nautical Almanac, and the " diff. for 1 hour " from page I as before. Subtract the true declination from 90° when the latitude and declination are of the same name, but add it to 90° when they are of contrary names, the sum or remainder will be the Sun's Polar Distance.... | |
 | George Frederick Chambers - Astronomy - 1877 - 968 pages
...FIND THE TIME. The following convenient method for determining the time is given by Norie : — " I. Subtract the Sun's Declination from 90° when the...90° when they are of contrary names, and the sum or remainder will be the Sun's polar distance. " 2. Add together the Sun's altitude, the polar distance,... | |
 | George Frederick Chambers - Astronomical instruments - 1890 - 602 pages
...following convenient method for determining the time is modified from a method given by Norie : — 1. Subtract the Sun's Declination from 90° when the...90° when they are of contrary names, and the sum or remainder will be the Sun's polar distance. 2. Add together the Sun's altitude, the polar distance,... | |
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. 2. Subtract the Sun's declination from 90«, when the latitude and declination are of the same name, or add it to 90*, when they are of contrary names ; and the sum, or remainder, will be the Sun's polar distance. , 3. Add together the Sun's polar distance,... 