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 6 - 10 από τα 58.
Σελίδα 74
... answering to the fhip's longitude is to be added to , or fubtracted from the decli- nation , according as the longitude is eaft or weft ; and the equa- tion anfwering to the time from noon , must be added or fubtracted , according as ...
... answering to the fhip's longitude is to be added to , or fubtracted from the decli- nation , according as the longitude is eaft or weft ; and the equa- tion anfwering to the time from noon , must be added or fubtracted , according as ...
Σελίδα 75
... answering to the fhip's longitude , and the interval between the given time and noon . Then if the longitude be weft , or the given time , between noon and midnight , add the corre- fponding equations to the Sun's right afcenfion ...
... answering to the fhip's longitude , and the interval between the given time and noon . Then if the longitude be weft , or the given time , between noon and midnight , add the corre- fponding equations to the Sun's right afcenfion ...
Σελίδα 76
... answering to the longitude is to be added , if the longitude is weft - but fubtracted , if eaft . If the declination is de- creafing , the contrary rule is to be applied . EXAMPLES . 1. Required the Moon's declination , Sept. 22 , 1792 ...
... answering to the longitude is to be added , if the longitude is weft - but fubtracted , if eaft . If the declination is de- creafing , the contrary rule is to be applied . EXAMPLES . 1. Required the Moon's declination , Sept. 22 , 1792 ...
Σελίδα 77
... answering thereto , from table v , and the remainder will be the true altitude of the ftar . EXAMPLES . Re- I. The obferved altitude of Arcturus is 38 ° 40 ' , and the height of the obferver's eye 18 feet above the furface of the water ...
... answering thereto , from table v , and the remainder will be the true altitude of the ftar . EXAMPLES . Re- I. The obferved altitude of Arcturus is 38 ° 40 ' , and the height of the obferver's eye 18 feet above the furface of the water ...
Σελίδα 79
... answering to the femidiameter and obferved altitude . To the observed altitude of the Moon's limb , apply the index er- ror , the augmented femidiameter and dip as formerly ; the aggre- gate will be the apparent altitude of the Moon's ...
... answering to the femidiameter and obferved altitude . To the observed altitude of the Moon's limb , apply the index er- ror , the augmented femidiameter and dip as formerly ; the aggre- gate will be the apparent altitude of the Moon's ...
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