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 16
... cofecant of the greatest elongation of the earth , as feen from that planet , which is called the Parallactic angle ; and the distance of the planet from the Earth is equal to the cotangent of that angle , the radius being unity ...
... cofecant of the greatest elongation of the earth , as feen from that planet , which is called the Parallactic angle ; and the distance of the planet from the Earth is equal to the cotangent of that angle , the radius being unity ...
Σελίδα 55
... fecant of the la- titude , the log . co - fecant of the azimuth , and the proportional lo- garithm of the interval of time between the obfervations of the al- titude and distance ; the fum , rejecting radius , will be the propor- tional ...
... fecant of the la- titude , the log . co - fecant of the azimuth , and the proportional lo- garithm of the interval of time between the obfervations of the al- titude and distance ; the fum , rejecting radius , will be the propor- tional ...
Σελίδα 86
... co - fine of the fhip's latitude , the log . fecant of the courfe , and the log . tangent of the Sun's azimuth ; the fum , rejecting tens in the index , will be the prop . log . of the correction answering to the change of latitude ...
... co - fine of the fhip's latitude , the log . fecant of the courfe , and the log . tangent of the Sun's azimuth ; the fum , rejecting tens in the index , will be the prop . log . of the correction answering to the change of latitude ...
Σελίδα 87
... fecant 1.9423 co - fecant , 0.2553 Azimuth 69 ° 45 ' tangent - Firft correction o ' 38 " P. Log . Mean of morning fet afternoon fet Uncorrected time of noon Equation of equal altitudes Equation of latitude 0.4331 fec . cor . 1 ' 9 " P.L ...
... fecant 1.9423 co - fecant , 0.2553 Azimuth 69 ° 45 ' tangent - Firft correction o ' 38 " P. Log . Mean of morning fet afternoon fet Uncorrected time of noon Equation of equal altitudes Equation of latitude 0.4331 fec . cor . 1 ' 9 " P.L ...
Σελίδα 90
... co - fecant - Azimuth 59 ° 40 ′ tan . = 0.2327 Second corr . Firft cor . 20 " P. L. 2.7248 Time of tranfit of ... cofecant de- clination , to radius unity . In places confiderably distant from the equa- * When the courfe and diftance ...
... co - fecant - Azimuth 59 ° 40 ′ tan . = 0.2327 Second corr . Firft cor . 20 " P. L. 2.7248 Time of tranfit of ... cofecant de- clination , to radius unity . In places confiderably distant from the equa- * When the courfe and diftance ...
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