On the Connexion of the Physical SciencesJ. Murray, 1858 - 523 pages |
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Page 46
... measuring the meridian curvature of the earth , the compression , and consequently its figure , become known . This ... measured in the following manner : — A terrestrial meridian is a line passing through both poles , all the points of ...
... measuring the meridian curvature of the earth , the compression , and consequently its figure , become known . This ... measured in the following manner : — A terrestrial meridian is a line passing through both poles , all the points of ...
Page 47
... measured by determining the latitude of its extreme points by astronomical observations ( N. 125 ) , and then measuring the distance between them in feet or fathoms . The distance thus determined on the surface of the earth , divided by ...
... measured by determining the latitude of its extreme points by astronomical observations ( N. 125 ) , and then measuring the distance between them in feet or fathoms . The distance thus determined on the surface of the earth , divided by ...
Page 48
... measured in various parts of the globe , of which the most extensive are the Russian arc of 25 ° 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 25 ° 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 ...
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61 Cygni absorbed action appears atmosphere attraction bismuth blue bodies centre centrifugal force chemical circular polarization coloured rings comet consequently copper crystal dark density diamagnetic diameter diminishes direction distance disturbing earth ecliptic effect electricity equal equator ethereal medium excentricity experiments extreme force gravitation greater heat hemisphere increase intensity Jupiter latitude length lines liquid longitude luminous lunar magnetic mass mean meridian metallic miles molecules moon motion move nebula nodal lines nodes NOTE nutation observed optic axis orbit parallax paramagnetic particles passing perihelion period perpendicular phenomena plane polarized light pole position prism produced quantity rays reflected refraction refrangible retrograde motion revolution revolving right angles rotation round satellites Sir John Herschel solar spectrum sound space stars substances sun's surface telescope temperature terrestrial theory tion tourmaline transmitted tricity undulations Uranus vapour velocity vibrations violet visible Voltaic waves wire