## The theory and practice of finding the longitude at sea or land: to which are added, various methods of determining the latitude of a place, and variation of the compass; with new tables. By Andrew Mackay, ... |

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Aberdeen aberration add the log angle answering apparent altitude apparent distance applied arc second arc third arch Arcturus azimuth co-secant co-sine co-tangent Co-versed sine coloured glass degrees Diff difference of longitude dist Earth eclipse emersion equal altitudes equation error fame finding the longitude fixed star given Greenwich half Hence horizon glass instrument interval logarithm London longitude at sea lower limb mean meridian altitude minutes Moon Moon's center Moon's horizontal parallax Moon's latitude motion Nautical Almanac nonagesimal noon Nutation O.I O.I O.I object Obliq observed altitude parallel place of observation planet polar distance precession prob quadrant Reduced latitude refraction Required the true Rule secant semidiameter sexagesimal sextant shipmaster star's subtract Sun's declination Sun's right ascension tangent telescope thereto tion true altitude true distance true longitude tude variation Versed sine watch zenith distance