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 xi
... Watch at Sea or Land IV . Of the methods of clearing the apparent Distance be- tween the Moon and the Sun or a fixed Star , from the effects of Refraction and Parallax V. Of finding the Longitude at Sea or Land by Lunar Obfervations 72 ...
... Watch at Sea or Land IV . Of the methods of clearing the apparent Distance be- tween the Moon and the Sun or a fixed Star , from the effects of Refraction and Parallax V. Of finding the Longitude at Sea or Land by Lunar Obfervations 72 ...
Σελίδα 52
... watch is not neceffary ; but if the object with which the Moon is compared be too near the meridian , the watch is abfolutely neceffary , in order to connect the obfervations for ascertaining the apparent time at the ship , and the ...
... watch is not neceffary ; but if the object with which the Moon is compared be too near the meridian , the watch is abfolutely neceffary , in order to connect the obfervations for ascertaining the apparent time at the ship , and the ...
Σελίδα 53
... watch is immediately to write down , firft the fecond , and then the minute of observation ; the hour being previously marked , the principal ob- ferver is to read off the distance , ufing the magnifying glass , which he is to ...
... watch is immediately to write down , firft the fecond , and then the minute of observation ; the hour being previously marked , the principal ob- ferver is to read off the distance , ufing the magnifying glass , which he is to ...
Σελίδα 54
... watch , P. 25 41 26 40 1 - Means , o h . 25 ′ 37 ′′ -54 ° 5 ' . 54 ° 6 ' 54 5 54 4 20 2 20 3 -oh . 28 ′ 47 ′′ -20 ° 3.3 - 20 5 27 50 Alt . D's u . limb - 28 44 29 46 - 31 10 Dift . nearest limbs 73 13 32 50 33 30 35 O 36 40 73 13 73 14 ...
... watch , P. 25 41 26 40 1 - Means , o h . 25 ′ 37 ′′ -54 ° 5 ' . 54 ° 6 ' 54 5 54 4 20 2 20 3 -oh . 28 ′ 47 ′′ -20 ° 3.3 - 20 5 27 50 Alt . D's u . limb - 28 44 29 46 - 31 10 Dift . nearest limbs 73 13 32 50 33 30 35 O 36 40 73 13 73 14 ...
Σελίδα 55
... watch is not known , altitudes of that object , when at a proper distance from the meridian , fhould have been taken before the obfervation of the distance , or must be taken afterwards , for the express pur- pose of ascertaining its ...
... watch is not known , altitudes of that object , when at a proper distance from the meridian , fhould have been taken before the obfervation of the distance , or must be taken afterwards , for the express pur- pose of ascertaining its ...
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