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 53
... same manner as from a single set , but much more to be depended on . To illuftrate the above , the following obfervations , taken in the manner described , are fubjoined . ▷ March 2d , 1789 , Height of the eye 18 feet . Times p . watch ...
... same manner as from a single set , but much more to be depended on . To illuftrate the above , the following obfervations , taken in the manner described , are fubjoined . ▷ March 2d , 1789 , Height of the eye 18 feet . Times p . watch ...
Σελίδα 227
... same affection , Co - fine Pfin fine ( PM + PS + MS ) . fine & ( PM + PS - MS . ) fine PM . fine PS . Let the moon's latitudem , the latitude of the stars , and the distance = d . Then , ( PM + PS + MS ) = ₺ ( 90 — m + 90 − s + d ) ...
... same affection , Co - fine Pfin fine ( PM + PS + MS ) . fine & ( PM + PS - MS . ) fine PM . fine PS . Let the moon's latitudem , the latitude of the stars , and the distance = d . Then , ( PM + PS + MS ) = ₺ ( 90 — m + 90 − s + d ) ...
Σελίδα 256
... same kind that was first taken . III . August 13 , 1788 , in latitude 57 ° 7 ′ N. longitude 2o 7 ' W. about half past eight in the morning , the following obfervations were taken , the height of the eye being 14 feet . Each quadrant of ...
... same kind that was first taken . III . August 13 , 1788 , in latitude 57 ° 7 ′ N. longitude 2o 7 ' W. about half past eight in the morning , the following obfervations were taken , the height of the eye being 14 feet . Each quadrant of ...
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