## Lunar and time tables, adapted to new methods for finding the longitude by chronometers and lunar distances. With an appendix1849 - 80 pages |

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### Common terms and phrases

1st arc 2d arc 58 Logarithmic Sines Aberdeen Apparent Distance April 17 Arc for Table Auxiliary Arc Calculation centre Chronometer showed corresponding Cosecant Sine Tangent D's Corr D's Hor Departure of Distance Difference of Latitude Ditto Equation of altitude EXAMPLE fast of Greenwich February 20 find the correction find the Mean finding the Longitude fixed star gives Greenwich mean Half-cosine Half-sine height Hence index error July July 20 June June 23 Less Apparent Altitude limb was observed LONGITUDE BY CHRONOMETERS Lunar Distance LUNAR METHOD Marischal College Mathematical Meridian Distance Moon in altitude Moon's Horizontal Parallax Nautical Almanac nearest limbs noon O'S ALTITUDE observer's eye Planet prime vertical Proportional Logarithms Refraction Required the Longitude right ascension second arcs semidiameter sextant ship Sine Tangent Cosecant Sun and Moon Sun's altitude Sun's declination Sun's lower limb Table contains 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 vii - I cannot adequately express, the letter which you did me the honour to address to me on the 22nd instant.

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.