On the Connexion of the Physical SciencesJ. Murray, 1858 - 523 pages |
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Page 48
... measured in various parts of the globe , of which the most extensive are the Russian arc of 250 20 between the Glacial Sea and the Danube , conducted under the superintendence of M. Struve , and the Indian arc ex- tended to 21 ° 21 ...
... measured in various parts of the globe , of which the most extensive are the Russian arc of 250 20 between the Glacial Sea and the Danube , conducted under the superintendence of M. Struve , and the Indian arc ex- tended to 21 ° 21 ...
Page 49
... measurement of an arc between Alexandria and Syene . There is another method of finding the figure of the earth ... measured by the deflection of any point from the tangent in a second . For , since the centrifugal force balances ...
... measurement of an arc between Alexandria and Syene . There is another method of finding the figure of the earth ... measured by the deflection of any point from the tangent in a second . For , since the centrifugal force balances ...
Page 52
... measured , all the angles and one side are given ; whence the distance of the moon from the centre of the earth may be computed . The parallax of an object may be found , if two observers under the same meridian , but at a very great ...
... measured , all the angles and one side are given ; whence the distance of the moon from the centre of the earth may be computed . The parallax of an object may be found , if two observers under the same meridian , but at a very great ...
Page 56
... measurement ; therefore their real diameters may be compared with that of the earth ; for the real diameter of a planet is to the real diameter of the earth , or 7926 miles , as the apparent diameter of the planet to the apparent ...
... measurement ; therefore their real diameters may be compared with that of the earth ; for the real diameter of a planet is to the real diameter of the earth , or 7926 miles , as the apparent diameter of the planet to the apparent ...
Page 83
... measuring duration , distance , magnitude , and velocity . The mean sidereal day measured by the time elapsed between two consecutive transits of any star at the same meridian ( N. 148 ) , and the mean sidereal year which is the time ...
... measuring duration , distance , magnitude , and velocity . The mean sidereal day measured by the time elapsed between two consecutive transits of any star at the same meridian ( N. 148 ) , and the mean sidereal year which is the time ...
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61 Cygni action appears atmosphere attraction bismuth bodies cause centre centrifugal force chemical colour comet consequently copper crystal dark degree density diamagnetic diameter diminishes direction disturbing double stars earth ecliptic effect electricity equal equator ethereal medium excentricity Fcap force glass gravitation greater heat hemisphere increase intensity Jupiter latitude length light lines liquid longitude luminous lunar magnetic major axis mass meridian metallic miles moon motion move nearly nebula nodal lines nodes northern hemisphere NOTE nutation observed optic axis orbit oscillations parallax paramagnetic particles passing perihelion periodic phenomena planets plate polarized pole position Post 8vo produced quantity rays reflected refraction refrangible revolution revolving right angles rings rotation round satellites Sir John Herschel solar spectrum space stars substances sun's surface telescope temperature terrestrial tion tourmaline transmitted tricity undulations Uranus vapour variation velocity vibrations Vols Voltaic waves wire Woodcuts