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
... Quadrant , Sextant , and Circular Inftrument , in their prefent improved ftate - alfo , an account of the corrections to be applied to the observed altitude of any celestial object , in order to reduce it to the true altitude . In book ...
... Quadrant , Sextant , and Circular Inftrument , in their prefent improved ftate - alfo , an account of the corrections to be applied to the observed altitude of any celestial object , in order to reduce it to the true altitude . In book ...
Σελίδα xi
... 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 applied to the altitude of an object obferved at ...
... 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 applied to the altitude of an object obferved at ...
Σελίδα 6
... quadrant is used , or when obferva- tions are taken with a Hadley's quadrant by the method of reflection , the altitude is measured from the fenfible Horizon ; and in either cafe the altitude must be reduced to the true Horizon . The ...
... quadrant is used , or when obferva- tions are taken with a Hadley's quadrant by the method of reflection , the altitude is measured from the fenfible Horizon ; and in either cafe the altitude must be reduced to the true Horizon . The ...
Σελίδα 24
... Quadrant , were , the Crofs Staff and Davis ' Quadrant . The advantages poffeffed by the latter for observations of the Sun's altitude brought it into more general ufe , efpecially among the British navigators . Obfervations , however ...
... Quadrant , were , the Crofs Staff and Davis ' Quadrant . The advantages poffeffed by the latter for observations of the Sun's altitude brought it into more general ufe , efpecially among the British navigators . Obfervations , however ...
Σελίδα 25
... Quadrant Nouveau de Mathematique , " & c . print- ed at Bruffels , 1631. This method of divifion may be thus illuftrated . Let two equal lines or circular arcs be so divided , that the number of equal divisions in the one , is one more ...
... Quadrant Nouveau de Mathematique , " & c . print- ed at Bruffels , 1631. This method of divifion may be thus illuftrated . Let two equal lines or circular arcs be so divided , that the number of equal divisions in the one , is one more ...
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