## Lunar and Time Tables, adapted to new, short and accurate methods for finding the Longitude by Chronometers and Lunar Distances ... With an appendix |

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1st arc 2d arc Aberdeen Apparent Distance April April 17 Arc for Table ART1CLE Auxiliary Arc Calculation centre Chronometer showed Corr corresponding Cosecant Sine Tangent Departure of Distance Difference of Latitude Ditto elliptical form Equation of altitude fast of Greenwich February 20 find the correction find the Mean finding the Longitude fixed star Greenwich mean Half-cosine Half-sine height Hence index error July July 11 June June 23 Latitude Less Apparent Altitude limb was observed Lunar Distance LUNAR METHOD Marischal College Mathematical Meridian Distance Moon in altitude Moon's Horizontal Parallax Nautical Almanac nearest limbs noon observer's eye original error Planet prime vertical Proportional Logarithms Refraction Required the Longitude Required the true right ascension second arcs semidiameter sextant ship Sine Tangent Cosecant subtract Sun and Moon Sun's altitude Sun's declination Sun's lower limb Table 1V Table contains Table V1 Tangent Cosecant Sine true altitude True Distance Versed Sine

### Popular passages

Page 5 - The civil day, which is that used by the generality of mankind, begins at midnight, and ends at the midnight following : it is divided into two parts of 12 hours each ; the first...

Page 62 - ADD TOGETHER THE LOGARITHMS OF THE SECOND AND THIRD TERMS, AND FROM THEIR SUM SUBTRACT THE LOGARITHM OF THE FIRST...

Page 37 - ... will be the right ascension of the meridian ; the difference between which and the right ascension of the...

Page 5 - The civil day, which is that adopted for the usual purposes of business, begins at midnight, and ends at the midnight following ; it is divided into two parts of 12 hours each ; the first 12 are marked AM, signifying ante meridiem, ie before the meridian or noon ; and the other 12 are marked p.

Page 12 - ... 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...

Page 9 - ... 2. Absolute Times. [1.] To convert Apparent Time into Mean Time. 605. Reduce the Equation of Time, taken from page I. of the Nautical Almanac, or from Table 62 by No. 583, or 584, and apply it to the given App.