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, ...J. Sewell, P. Elmsly, and J. Evans, 1793 |
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Σελίδα v
... these causes , the place of the ship by account is very seldom found to agree with the real place , or that deduced from obfervation the difference frequent- ly amounting to several degrees . It is therefore obvious , A that that the ...
... these causes , the place of the ship by account is very seldom found to agree with the real place , or that deduced from obfervation the difference frequent- ly amounting to several degrees . It is therefore obvious , A that that the ...
Σελίδα vi
... these objects ; but withregard to the longitude , a more difficult operation becomes necessary . At land , indeed , the longitude of any place may be found with very little trouble by feveral methods , particularly by the eclipfes of ...
... these objects ; but withregard to the longitude , a more difficult operation becomes necessary . At land , indeed , the longitude of any place may be found with very little trouble by feveral methods , particularly by the eclipfes of ...
Σελίδα viii
... These are , by the Moon's tranfit over the meridian , by lunar eclipfes , folar eclipfes , occultations of fixed stars by the Moon , eclipfes of the fatellites of Jupiter , by a Chronometer , and by the Variation Chart . Every treatise ...
... These are , by the Moon's tranfit over the meridian , by lunar eclipfes , folar eclipfes , occultations of fixed stars by the Moon , eclipfes of the fatellites of Jupiter , by a Chronometer , and by the Variation Chart . Every treatise ...
Σελίδα xi
... these Ob- fervations . CHAP . I. Of Hadley's Quadrant II . Of the Sextant 24 39 III . Of the Circular Inftrument of Reflection - 44 IV . Of the manner of taking a complete fet of Lunar Ob- fervations 52 V. Of the Corrections to be ...
... these Ob- fervations . CHAP . I. Of Hadley's Quadrant II . Of the Sextant 24 39 III . Of the Circular Inftrument of Reflection - 44 IV . Of the manner of taking a complete fet of Lunar Ob- fervations 52 V. Of the Corrections to be ...
Σελίδα 1
... these bodies , could not be depended on for afcertaining the fituation of places on the Earth ; hence the neceffity of knowing both the figure and mag- nitude of the Earth is apparently obvious . The opinions of the antients concerning ...
... these bodies , could not be depended on for afcertaining the fituation of places on the Earth ; hence the neceffity of knowing both the figure and mag- nitude of the Earth is apparently obvious . The opinions of the antients concerning ...
Άλλες εκδόσεις - Προβολή όλων
The Theory and Practice of Finding the Longitude at Sea Or Land: To Which ... Andrew MacKay Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
The Theory And Practice Of Finding The Longitude At Sea Or Land Andrew MacKay Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
Συχνά εμφανιζόμενοι όροι και φράσεις
Aberdeen add the log adjuſtment alfo alſo anfwering angle apparent altitude apparent diſtance arc fecond arc firft arch Arcturus arifing azimuth becauſe cafe co-fecant co-fine co-tangent Co-verfed computing correction correfponding courſe degrees Diff dift divifion Earth ecliptic emerfion equal altitudes equation error fame fecant feen femidiameter fextant fhip fhould figns fince finding the Longitude firſt Fixed Star folar ftar fubtract given glaſs greateſt Greenwich half Hence horizon glafs horizontal parallax increaſe inftrument interfection interval laſt latitude lefs limb logarithm mean meaſured meridian method Moon moſt motion muſt Nautical Almanac neareſt neceffary nonagefimal noon obferved altitude object Obliq paffing place of obfervation planet pofition purpoſe quadrant reduced Reduced latitude refraction Rifing ſhip ſtar Sun's right afcenfion tangent teleſcope thefe theſe tion tranfit true altitude true diſtance true longitude tude uſed variation Verfed Verfed fine watch weft zenith diſtance ΙΟ