On the Connexion of the Physical SciencesJ. Murray, 1858 - 523 pages |
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Page 47
... 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 ) , and then measuring the distance between them in feet ...
... 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 ) , and then measuring the distance between them in feet ...
Page 49
... surface of the earth would fly off in the tangent by the centrifugal force , instead of bending round in the circle of rotation . Therefore , the deflection of the circle from the tangent in a second measures the intensity of the ...
... surface of the earth would fly off in the tangent by the centrifugal force , instead of bending round in the circle of rotation . Therefore , the deflection of the circle from the tangent in a second measures the intensity of the ...
Page 50
... surface , it diminishes the force of gravity by a small quantity . Hence , by gravitation , which is the difference of these two forces , the fall of bodies ought to be accelerated from the equator to the poles proportion- ably to the ...
... surface , it diminishes the force of gravity by a small quantity . Hence , by gravitation , which is the difference of these two forces , the fall of bodies ought to be accelerated from the equator to the poles proportion- ably to the ...
Page 57
... surface of the sun ; whereas at the surface of some of the new planets he would be so light that it would be impossible to stand steady , since he would only weigh a few pounds . The mean density of the earth has been determined by the ...
... surface of the sun ; whereas at the surface of some of the new planets he would be so light that it would be impossible to stand steady , since he would only weigh a few pounds . The mean density of the earth has been determined by the ...
Page 68
... surface to the earth . But theory proves that this never can happen ; for the rotation of the moon , though it does not partake of the periodic inequalities of her revolution , is affected by the same secular variations , so that her ...
... surface to the earth . But theory proves that this never can happen ; for the rotation of the moon , though it does not partake of the periodic inequalities of her revolution , is affected by the same secular variations , so that her ...
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Common terms and phrases
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