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 vii
... half a degree , ( which at fea is esteemed no very great er- ror , ) and if the calculations are accurately performed , from the mean of several fets of good obfervations , taken at short intervals of time , the error will perhaps be ...
... half a degree , ( which at fea is esteemed no very great er- ror , ) and if the calculations are accurately performed , from the mean of several fets of good obfervations , taken at short intervals of time , the error will perhaps be ...
Σελίδα 4
... half minute glafs is commonly used , and a line divid- ed accordingly ; and fince half a minute is the 120th part of an hour , therefore the interval between two adjacent knots on the line should 6080 50 feet 8 inches ; but because it ...
... half minute glafs is commonly used , and a line divid- ed accordingly ; and fince half a minute is the 120th part of an hour , therefore the interval between two adjacent knots on the line should 6080 50 feet 8 inches ; but because it ...
Σελίδα 5
... half a fecond being allowed for the time taken in turning the glass . D CHA P. II . DEFINITIONS , PRINCIPLES , & C . AY and Night arife from the circumrotation of the Earth . That imaginary line about which the rotation is performed is ...
... half a fecond being allowed for the time taken in turning the glass . D CHA P. II . DEFINITIONS , PRINCIPLES , & C . AY and Night arife from the circumrotation of the Earth . That imaginary line about which the rotation is performed is ...
Σελίδα 7
... half a second yearly . * The Ecliptic , like all other circles of the sphere , is divided into 360 ° , and is further divided into 12 equal parts , called SIGNS ; each fign therefore contains 30 ° . The names and characters of these ...
... half a second yearly . * The Ecliptic , like all other circles of the sphere , is divided into 360 ° , and is further divided into 12 equal parts , called SIGNS ; each fign therefore contains 30 ° . The names and characters of these ...
Σελίδα 11
... half a revolution in half that time , and confequently if that star was before at its nearest appulfe to the pole , it will now be the most remote from It poffible ; therefore 12873 years after the year 2102 , that is , in the year ...
... half a revolution in half that time , and confequently if that star was before at its nearest appulfe to the pole , it will now be the most remote from It poffible ; therefore 12873 years after the year 2102 , that is , in the year ...
Άλλες εκδόσεις - Προβολή όλων
The Theory And Practice Of Finding The Longitude At Sea Or Land Andrew MacKay Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
The Theory and Practice of Finding the Longitude at Sea Or Land Andrew MacKay Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
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