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 v
... errors arising from these causes , the place of the ship by account is very seldom found to agree with the real place , or that deduced from obfervation the difference frequent- ly amounting to several degrees . It is therefore obvious ...
... errors arising from these causes , the place of the ship by account is very seldom found to agree with the real place , or that deduced from obfervation the difference frequent- ly amounting to several degrees . It is therefore obvious ...
Σελίδα vii
... error will perhaps be greatly diminished . If a chronometer or timekeeper could be conftructed , fo as to go uniformly when placed in every different pofition , and under different degrees of heat , then would this method of finding the ...
... error will perhaps be greatly diminished . If a chronometer or timekeeper could be conftructed , fo as to go uniformly when placed in every different pofition , and under different degrees of heat , then would this method of finding the ...
Σελίδα x
... errors , principally typographical , have escaped notice . Those already observed are marked in the following table of errata - which , it is intreated , the reader will be pleafed to correct . ERRAT A. Page 7 line 31 for - 23 ( fig . 3 ) ...
... errors , principally typographical , have escaped notice . Those already observed are marked in the following table of errata - which , it is intreated , the reader will be pleafed to correct . ERRAT A. Page 7 line 31 for - 23 ( fig . 3 ) ...
Σελίδα 24
... error , when the fea was agitated ; and it was found impoffi- ble to obferve the Sun's altitude , when the motion of the ship was very confiderable . Hence appears the fuperior excellence of Hadley's quadrant , which is defigned to be ...
... error , when the fea was agitated ; and it was found impoffi- ble to obferve the Sun's altitude , when the motion of the ship was very confiderable . Hence appears the fuperior excellence of Hadley's quadrant , which is defigned to be ...
Σελίδα 27
... error , however , is now removed by Mr Dollond , who contrived the frame fo , that the glafs lies on three points ... errors may arife from thefe double reflections ; in order to prevent which , Dr Maske- lyne proposed , that the back of ...
... error , however , is now removed by Mr Dollond , who contrived the frame fo , that the glafs lies on three points ... errors may arife from thefe double reflections ; in order to prevent which , Dr Maske- lyne proposed , that the back of ...
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