Lunar and horary tables, for ... ascertaining the longitude |
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... Rule for making use of the facilities afforded by the Nautical Almanac for reducing the Sun's Declination , & c . , which will be found a shorter method A Rule to find the Sun's True Azimuth , at than having recourse to Logarithms .
... Rule for making use of the facilities afforded by the Nautical Almanac for reducing the Sun's Declination , & c . , which will be found a shorter method A Rule to find the Sun's True Azimuth , at than having recourse to Logarithms .
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David Thomson (inventor of the longitude scale.) Boulter J Bell. A Rule to find the Sun's True Azimuth , at the same time with his horary angle , only two additional logarithms being required , which will be found convenient ; for , by ...
David Thomson (inventor of the longitude scale.) Boulter J Bell. A Rule to find the Sun's True Azimuth , at the same time with his horary angle , only two additional logarithms being required , which will be found convenient ; for , by ...
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... rule for working the Latitude by them . It frequently happens , when near the British Islands , as well as in other parts of the world , that the Sun is obscured at noon , though the night may afford many opportunities of determining ...
... rule for working the Latitude by them . It frequently happens , when near the British Islands , as well as in other parts of the world , that the Sun is obscured at noon , though the night may afford many opportunities of determining ...
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... RULE . To find the Apparent Time . 1. Add together the Sun's altitude , the polar distance , and the latitude of the place of observation ; find the half sum , and the difference between the half sum and the Sun's altitude . 2. To the ...
... RULE . To find the Apparent Time . 1. Add together the Sun's altitude , the polar distance , and the latitude of the place of observation ; find the half sum , and the difference between the half sum and the Sun's altitude . 2. To the ...
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... RULE . 1. With the latitude of the place , the Star's true altitude and de- clination , find the Star's horary distance west of the meridian , in the same manner as the Sun's horary angle is found by Problem Í . 2. To the complement ...
... RULE . 1. With the latitude of the place , the Star's true altitude and de- clination , find the Star's horary distance west of the meridian , in the same manner as the Sun's horary angle is found by Problem Í . 2. To the complement ...
Häufige Begriffe und Wortgruppen
Add for Seconds ALDEBARAN apparent distance Arcturus astronomical Betelguese Chro Constellation Corr D's App daily rate decg decl deduced degrees Deneb Diff ecliptic error and rate error for mean EXAMPLE find the Error find the mean finding the longitude Fixed Star Greenwich date Greenwich mean horary angle incg index error interval LOGARITHMS LOGARITHMS of NUMBERS lunar distances M. T. Gwh mean noon merid Moon's app Moon's apparent altitude Moon's hor Moon's horizontal parallax Moon's red natural number natural versed sine Nautical Almanac nearly object observed altitude observed distance observed East opposite place of observation Planet polar distance Pole Star prime vertical PROPORTIONAL LOGARITHMS refraction right ascension SECOND CORRECTIONS SECOND DIFFERENCE semid Sextant slow for mean Star's subtracted SUM and DIFFERENCE SUM OR DIFFERENCE Sun's Apparent Altitude Sun's declination Sun's true Table taken Telescope Ther THIRD CORRECTION true altitude true distance tude Ursa Major watch West
Beliebte Passagen
Seite 70 - C, as seen above, are constants, depending upon the latitude of the place of observation and the declination of the star. Tables for these quantities will be found in an appendix to Annual Report US Coast and Geodetic Survey for 1874.
Seite 54 - Gamma ; and so on. When the number of stars in a constellation, exceeds the letters in the Greek alphabet, the letters of the Roman alphabet, a, b, c, d, &c. are applied to the remaining stars in the same manner ; and when these are not sufficient, the numbers, 1, 2, 3, 4, 5, &c.
Seite 56 - Aries, the Ram ; 2. Taurus, the Bull ; 3. Gemini, the Twins ; 4. Cancer, the Crab ; 5. Leo, the Lion ; 6. Virgo, the Virgin ; 7. Libra, the Balance ; 8. Scorpio, the Scorpion; 9. Sagittarius, the Archer ; 10. Capricornus, the Goat; 11. Aquarius, the Water-bearer ; 12. Pisces, the Fishes.
Seite 9 - ... will be the right ascension of the meridian. From the right ascension of the meridian (increased by 24 hours if necessary) subtract the sun's right ascension...
Seite 63 - Subtract the true altitude of the sun's centre from 90°, and the remainder will be the sun's true meridian zenith distance, which is to be called north or south according as the observer is north or south of the sun at the time of observation.
Seite 25 - Rule. — Find the latitudes of both places; if both be north, or both south, their difference will be the answer; but if one be north and the other south, their sum will be the answer. Exercise.— What is the difference of lat. between Philadelphia and Petersburg? Ans., 20 degrees. Between Madras and Waterford? Am., 39° 13'.