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 58.
Σελίδα 49
... answering to the observed angle . If the firft mean exceeds the fecond , the error is fubtractive ; otherwife fubtractive , the mirror being in its first pofition . The error correfponding to any other angle may be found thus . ' Add ...
... answering to the observed angle . If the firft mean exceeds the fecond , the error is fubtractive ; otherwife fubtractive , the mirror being in its first pofition . The error correfponding to any other angle may be found thus . ' Add ...
Σελίδα 58
... answering to an elevation of 100 feet above the furface of the fea ? Conftant logarithm 0,4236 Given height , 100 feet , 1 ' 40 " P. L. 2,0334 Sum 2,4570 Dip of the horizon , 10 ' 38 ′′ P. L. 1,2285 The dip is affected by Terrestrial ...
... answering to an elevation of 100 feet above the furface of the fea ? Conftant logarithm 0,4236 Given height , 100 feet , 1 ' 40 " P. L. 2,0334 Sum 2,4570 Dip of the horizon , 10 ' 38 ′′ P. L. 1,2285 The dip is affected by Terrestrial ...
Σελίδα 60
... answering to any given altitude would alfo continue invariable - but this is by no means the cafe ; for it is found by observation , that the density of the atmosphere is variable , and according to the experiments of Mr Haukfbee and ...
... answering to any given altitude would alfo continue invariable - but this is by no means the cafe ; for it is found by observation , that the density of the atmosphere is variable , and according to the experiments of Mr Haukfbee and ...
Σελίδα 61
... answering to a change of 10o in Reaumur's thermometer , to be of the whole ; M. Mayer makes this change to be . According to Dr Bradley , The true re- fraction is to the mean , in a direct ratio of the altitude of the barometer to 29.6 ...
... answering to a change of 10o in Reaumur's thermometer , to be of the whole ; M. Mayer makes this change to be . According to Dr Bradley , The true re- fraction is to the mean , in a direct ratio of the altitude of the barometer to 29.6 ...
Σελίδα 63
... answering to the equatorial radius , and therefore , in order to reduce it to any given latitude , it must be diminished by a certain quantity . Table XXXII . contains this quantity , agreeable to Sir Ifaac Newton's hypothefis . Summary ...
... answering to the equatorial radius , and therefore , in order to reduce it to any given latitude , it must be diminished by a certain quantity . Table XXXII . contains this quantity , agreeable to Sir Ifaac Newton's hypothefis . Summary ...
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