The New American Grammar of the Elements of Astronomy: On an Improved Plan: in Three Books. I. The Use of the Terrestrial Globe in the Solution of Geographical and Astronomical Problems. II. The Use of the Celestial Globe in the Solution of Problems, Relative to the Sun, Planets, and Fixed Stars. III. The Solar System, and the Firmament of Fixed Stars. The Whole Systematically Arranged and Scientifically Illustrated; with Several Cuts and Engravings; and Adapted to the Instruction of Youth in Schools and AcademiesCollins and Hannay, 1827 - 375 pages |
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Page 18
... elevated pole of our rational horizon , and the nadir , being diametrically opposite to the zenith , is the depressed pole . 6. Azimuth , or vertical circles , are imaginary great circles passing through the zenith and nadir , and ...
... elevated pole of our rational horizon , and the nadir , being diametrically opposite to the zenith , is the depressed pole . 6. Azimuth , or vertical circles , are imaginary great circles passing through the zenith and nadir , and ...
Page 21
... elevated districts are even cold ; the valley of Quito is always green ; and per- haps the interior of Africa contains more than one region which nature has gifted with the same privilege . Nothing equals the majestic beauty of the ...
... elevated districts are even cold ; the valley of Quito is always green ; and per- haps the interior of Africa contains more than one region which nature has gifted with the same privilege . Nothing equals the majestic beauty of the ...
Page 23
... elevated districts are even cold ; the valley of Quito is always green ; and per- haps the interior of Africa contains more than one region which nature has gifted with the same privilege . Nothing equals the majestic beauty of the ...
... elevated districts are even cold ; the valley of Quito is always green ; and per- haps the interior of Africa contains more than one region which nature has gifted with the same privilege . Nothing equals the majestic beauty of the ...
Page 24
... Elevated countries feel all the rigours of winter - and the trees even in the plains lose their foliage , and remain stripped of verdure during the months of No- vember and December . It is from the 40th to the 60th degree , that the ...
... Elevated countries feel all the rigours of winter - and the trees even in the plains lose their foliage , and remain stripped of verdure during the months of No- vember and December . It is from the 40th to the 60th degree , that the ...
Page 34
... elevated above the horizon as many degrees as are equal to the latitude , and the opposite pole is de- pressed as much below the horizon ; so that the stars only , at the former , are seen . The sun and all the heavenly bodies rise and ...
... elevated above the horizon as many degrees as are equal to the latitude , and the opposite pole is de- pressed as much below the horizon ; so that the stars only , at the former , are seen . The sun and all the heavenly bodies rise and ...
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Common terms and phrases
21st of June analemma angle aphelion appear Aries astronomers axis azimuth brazen meridian bring the given bring the sun's called celestial globe climate comet constellation Cor Caroli days and nights difference diurnal motion earth east eastward ecliptic elevated equal equator equinoctial point equinox find the sun's fixed stars given day given place globe westward greatest heavens hemisphere Hence horizon hour circle inferior conjunction inferior planet inhabitants Jupiter latitude length longest day longitude mean distance Mercury meridian altitude minutes moon nearly New-York node noon north latitude north or south north pole number of degrees o'clock oblique observed orbit parallax parallel of latitude perihelion polar circles principal star Prob PROBLEM quadrant of altitude Rectify the globe remarkable stars retrograde revolution right ascension rise and set second magnitude set the index solar south pole southern sun rise sun's declination sun's place supposed surface telescope tion tropic tude turn the globe Venus zenith
Popular passages
Page 25 - Absolute, true, and mathematical time, of itself, and from its own nature, flows equably without relation to anything external, and by another name is called duration: relative, apparent, and common time, is some sensible and external (whether accurate or unequable) measure of duration by the means of motion, which is commonly used instead of true time; such as an hour, a day, a month, a year.
Page 252 - ... us on to suppose that it is most probably also inhabited, like the rest of the planets, by beings whose organs are adapted to the peculiar circumstances of that vast globe.
Page 365 - ... in diameter. The star is perfectly in the centre, and the atmosphere is so diluted, faint, and equal throughout, that there can be no surmise of its consisting of stars ; nor can there be a doubt of the evident connection between the atmosphere and the star. Another star not much less in brightness, and in the same field with the above, was perfectly free from any such appearance.
Page 18 - The AMPLITUDE of any object in the heavens is an arc of the horizon, contained between the centre of the object when rising, or setting, and the east or west points of the horizon.
Page 252 - ... show that heat is produced by the sun's rays only when they act on a calorific medium: they are the cause of the production of heat, by uniting with the matter of fire which is contained in the substances that are heated...
Page 59 - Antipodes)o the inhabitants of any place. RULE. Place the two poles of the globe in the horizon, and bring the -given place to the eastern part of the horizon ; then, if the given place be in north latitude, observe how many degrees it is to the northward of the east point of the horizon ; the same number of degrees to the southward of the east point will show the...
Page 57 - Find the sun's declination and elevate the north or south pole, according as the declination is north or south so many degrees above the horizon, as are equal to the sun's declination ; bring the given place to the brass meridian, and set the index of the hour circle to 12. Turn the globe eastward till the given place comes to the horizon, and the index will shew the time of the sun's rising.
Page 60 - EleVate the north or south pole, according as the latitude is north or south, so many degrees aboVe the horizon as are equal to the latitude of the gtVen place.
Page 12 - The tropics are two small circles parallel to the equator at the distance of 23° 28' from it ; the northern, is called the tropic of cancer, and the southern, the tropic of Capricorn.