On the Connexion of the Physical SciencesJ. Murray, 1858 - 523 pages |
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Page 47
... length of a degree in different parts of the earth's surface will therefore determine its size and form . An arc of the meridian may be measured by determining the latitude of its extreme points by astronomical observations ( N. 125 ) ...
... length of a degree in different parts of the earth's surface will therefore determine its size and form . An arc of the meridian may be measured by determining the latitude of its extreme points by astronomical observations ( N. 125 ) ...
Page 48
... length of a degree of the meridian is 6914 English miles . Therefore 360 degrees , or the whole equa- * Sir John Herschel remarks that there are just as many thousands of feet in a degree of the meridian in our latitude as there are ...
... length of a degree of the meridian is 6914 English miles . Therefore 360 degrees , or the whole equa- * Sir John Herschel remarks that there are just as many thousands of feet in a degree of the meridian in our latitude as there are ...
Page 50
... length of the pendulum must be altered . By numerous and careful experi- ments it is proved that a pendulum , which oscillates 86,400 times in a mean day at the equator , will do the same at every point of the earth's surface , if its ...
... length of the pendulum must be altered . By numerous and careful experi- ments it is proved that a pendulum , which oscillates 86,400 times in a mean day at the equator , will do the same at every point of the earth's surface , if its ...
Page 51
... length of the pendulum , as show that the figure of the earth is very complicated . But they are so small , when compared with the general results , that they may be disregarded . The compression deduced from the mean of the whole ...
... length of the pendulum , as show that the figure of the earth is very complicated . But they are so small , when compared with the general results , that they may be disregarded . The compression deduced from the mean of the whole ...
Page 52
... length ; and , as the parallax or angle at the moon can be 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 ...
... length ; and , as the parallax or angle at the moon can be 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 ...
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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