Lucas's tables for finding the longitude by the meridian altitude, at sea, without the aid of a chronometer. Ed. J.C. Manning, Volume 3 |
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21 Secant 42 Co-Secant 47 Secant 50 60 PROPORTIONAL 51 Sine aftern altitude at noon Apparent Ascension BARBADOES Bridge rises sets CHRONOMETER co co co Co-Secant Co-Sine correction D.
D. High Water DAILY VARIATION Declination O's dec deviation diameter difference Dist East Epitome EXAMPLE experience find the mean finding the corrections finding the Longitude full altitude Greenwich altitude Greenwich mean HALF SUM High Water Sun HOURS JOURNAL OFFICE July 21st July 9th June 5th laid Latitude London Bridge rises Long Meridian altitude method method of finding Multiply Noon's altitude north of 45 Polar Distance prove the meridian Remain result rising and setting RULE Secant SECONDS ship shown Sine Sun's Declination Sun's Diff Sun's Equat Sun's Semi SWANSEA take half Take the full taken THURSDAY Water Sun Sun West Тн स स स து