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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Αποτελέσματα 1 - 5 από τα 34.
Σελίδα x
... arc first - arc fecond + b . 2 fame the - + L. 2 . fame time , the an obfervation arc fecond arc first O F THE FIRST VOLUM E. BOOK I. In which To reduce the true altitude of the Sun to its appa-
... arc first - arc fecond + b . 2 fame the - + L. 2 . fame time , the an obfervation arc fecond arc first O F THE FIRST VOLUM E. BOOK I. In which To reduce the true altitude of the Sun to its appa-
Σελίδα 32
... first , and the other the fecond rod ; now the obferver being placed at the ... arc for that purpose , and then the plane of the back horizon glass will be ... first rod ; move the index till the fecond feen by reflection coincides with ...
... first , and the other the fecond rod ; now the obferver being placed at the ... arc for that purpose , and then the plane of the back horizon glass will be ... first rod ; move the index till the fecond feen by reflection coincides with ...
Σελίδα 105
... arc first , if the declinations of the stars are of the fame name ; but if of contrary names , the fum of those quantities will be arc firft . Now to the log . co - fine of arc firft , add the log . tangent of the latitude , and the log ...
... arc first , if the declinations of the stars are of the fame name ; but if of contrary names , the fum of those quantities will be arc firft . Now to the log . co - fine of arc firft , add the log . tangent of the latitude , and the log ...
Σελίδα 106
... arc first . Now , to the log . co - fecant of arc firft , add the log . co - tangent of the declination of the first observed ftar , and the log . tangent of the declination of the other star ; the fum will be the log . of a natu- ral ...
... arc first . Now , to the log . co - fecant of arc firft , add the log . co - tangent of the declination of the first observed ftar , and the log . tangent of the declination of the other star ; the fum will be the log . of a natu- ral ...
Σελίδα 107
... Arc firft 2 37 29 39 ° 22 ′ 15 ′′ co - fecant o.197680 App . decl . Aldebaran 16 4 55 App . decl . Vega Arc firft co ... first ; call half the interval between the inftants when the two leaft altitudes were observ- ed , arc fecond ; and let ...
... Arc firft 2 37 29 39 ° 22 ′ 15 ′′ co - fecant o.197680 App . decl . Aldebaran 16 4 55 App . decl . Vega Arc firft co ... first ; call half the interval between the inftants when the two leaft altitudes were observ- ed , arc fecond ; and let ...
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