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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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