## A set of linear tables, for correcting the apparent distance of the moon from the sun or a fixed star, for the effect of refraction; to which are added, tables for parallax, and rules for computing the true distance |

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5105 First Arch altitude 18 altitude 20 altitude 49 31 altitude 57 APPARENT ALTITUDE Apparent distance 102 Arch 41 ascertaining the Longitude co-secant Corr Corrected distance CORRECTING LUNAR DISTANCES correction for parallax correction for refraction corresponding corrections Dist distance 30 distance 59 distance 91 distance corrected EFFECT OF REFRACTION Enter Table EXAMPLE f Apparent find the correction find the true give the correction given distance greater altitude 34 LEADENHALL STREET left margin left side margin less altitude 23 Linear Table marked meets the greater Moon moon's altitude Moon's app MOON'S APPARENT Moon's hor moon's horizontal parallax moon's parallax NAUTICAL NAVIGATION nearest second number of seconds oblique curved lines parallax in altitude perpendicular lines Pro.Log proportional logarithm referred horizontally refraction and parallax rejecting 20 required the cor right hand margin Second Arch seldom amount side column Sine Star's app subtracted sum or remainder Sun's app sun's parallax tion true distance