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 viii
... tion of this important problem , is divided into two volumes , and the first volume is divided into fix books . The first book contains the general principles neceffary for a proper knowledge of the fubject . Book fecond contains the ...
... tion of this important problem , is divided into two volumes , and the first volume is divided into fix books . The first book contains the general principles neceffary for a proper knowledge of the fubject . Book fecond contains the ...
Σελίδα 2
... tion with respect to the luminous body , be circular , when project- ed on a plane perpendicular to the line joining the centers of both , the body itself is a sphere . Now fince a lunar eclipfe arifes from the paffage of the moon thro ...
... tion with respect to the luminous body , be circular , when project- ed on a plane perpendicular to the line joining the centers of both , the body itself is a sphere . Now fince a lunar eclipfe arifes from the paffage of the moon thro ...
Σελίδα 7
... tion of the fun , is completed in fix months , the maximum of which is only haif a fe- cond ; the other , called the Nutation of the Earth's Axis , is completed in a revolution of the Moon's nodes , or 18 years 224 days , and is ufually ...
... tion of the fun , is completed in fix months , the maximum of which is only haif a fe- cond ; the other , called the Nutation of the Earth's Axis , is completed in a revolution of the Moon's nodes , or 18 years 224 days , and is ufually ...
Σελίδα 11
... tion about the axis of the ecliptic in 25746 years , therefore any giv- en fixed ftar will perform half a revolution in half that time , and confequently if that star was before at its nearest appulfe to the pole , it will now be the ...
... tion about the axis of the ecliptic in 25746 years , therefore any giv- en fixed ftar will perform half a revolution in half that time , and confequently if that star was before at its nearest appulfe to the pole , it will now be the ...
Σελίδα 14
... tion . * Since the orbits of the planets , Mercury and Venus , are contain- ed within that of the Earth , they can never be feen in oppofition to the fun ; but because the orbit of the Earth is contained within the orbits of the other ...
... tion . * Since the orbits of the planets , Mercury and Venus , are contain- ed within that of the Earth , they can never be feen in oppofition to the fun ; but because the orbit of the Earth is contained within the orbits of the other ...
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