Astronomical and Geographical Essaysauthor, 1789 - 665 páginas |
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Página vi
... our present knowledge of the heavens , by which geography has been improved , and by which the paffage of ships over the tracklefs ocean is facilitated . There There is no part of mathematical science more fimple and vi PREFACE .
... our present knowledge of the heavens , by which geography has been improved , and by which the paffage of ships over the tracklefs ocean is facilitated . There There is no part of mathematical science more fimple and vi PREFACE .
Página xvi
... Ship upon the Arch of a great Circle , & c . 400 Of the Celestial Globe 421 1. To rectify the Celestial Globe LI . To find the Declination of the Sun LII . To find the Sun's Right Ascension LIII . To find the Sun's Amplitude LIV . To ...
... Ship upon the Arch of a great Circle , & c . 400 Of the Celestial Globe 421 1. To rectify the Celestial Globe LI . To find the Declination of the Sun LII . To find the Sun's Right Ascension LIII . To find the Sun's Amplitude LIV . To ...
Página 81
... ship be departing from us , we first lofe fight of the hull , at a greater distance the main fails dif- appear , and at a ftill greater the top - fail . But if the furface of the fea were a plane , the body of the ship , being the ...
... ship be departing from us , we first lofe fight of the hull , at a greater distance the main fails dif- appear , and at a ftill greater the top - fail . But if the furface of the fea were a plane , the body of the ship , being the ...
Página 82
... ships meeting at fea , the top - mast of each are the parts first discovered by both , the hull , & c . being concealed by the convexity of the globe which rises between them . The fhips may , in this inftance , be refembled to two men ...
... ships meeting at fea , the top - mast of each are the parts first discovered by both , the hull , & c . being concealed by the convexity of the globe which rises between them . The fhips may , in this inftance , be refembled to two men ...
Página 83
... ship d , while the top - maft is ftill visible ; and that it is not till the fhip comes to e that the whole of it is vifible . Obferve any star near the northern part of the horizon , and if you travel to the fouth , it will feem to dip ...
... ship d , while the top - maft is ftill visible ; and that it is not till the fhip comes to e that the whole of it is vifible . Obferve any star near the northern part of the horizon , and if you travel to the fouth , it will feem to dip ...
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Términos y frases comunes
aftronomy alfo alſo apparent motion atmoſphere becauſe bodies braſs meridian broad paper circle called cauſes celeftial confequently conjunction decreaſe defcribe degrees diameter diftinguiſhed diſappear diſcovered diſtance diurnal motion earth eaſt ecliptic elongation equator faid fame fatellites feen fhadow fhew fhould fide figns firſt fituation fixed ftars fize folar fome fometimes fouth fouthern fpectator fuch fummer fun appears fun's fuperior fuppofe furface fyftem greateſt heavens hemifphere horizon increaſe inferior conjunction inferior planets inhabitants interfect itſelf Jupiter latitude lefs light London longitude meaſure Mercury miles moon moon's moſt move muſt night nodes obferved oppofite orbit paffes paffing parallax parallel phænomena pofition polar circle pole reaſon repreſent reſpect retrograde motion revolves round rife round the fun Saturn ſeen ſhall ſhe ſmall ſpace ſphere ſpots ſtars ſuppoſe ſyſtem teleſcope thefe theſe thofe thoſe tropic of Cancer univerfe uſed Venus viſible weft whofe