On the Connexion of the Physical SciencesJ. Murray, 1858 - 523 pages |
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Page 39
... angle of 1918 ′′ -1 . That of the earth would appear under an angle of 6908 ′′ .3 . So that the length of the shadow is at least three times and a half greater than the distance of the moon from the earth , and the breadth of the shadow ...
... angle of 1918 ′′ -1 . That of the earth would appear under an angle of 6908 ′′ .3 . So that the length of the shadow is at least three times and a half greater than the distance of the moon from the earth , and the breadth of the shadow ...
Page 43
... angles which the visual rays from the object form with it are measured ; their sum sub- tracted from two right angles gives the angle opposite the base ; therefore , by trigonometry , all the angles and sides of the triangle may be ...
... angles which the visual rays from the object form with it are measured ; their sum sub- tracted from two right angles gives the angle opposite the base ; therefore , by trigonometry , all the angles and sides of the triangle may be ...
Page 47
... angle contained between the verticals at the extremities of the arc . This would be easily accomplished were the ... angles of which are either measured or computed , so that the length of the arc is ascertained with much laborious ...
... angle contained between the verticals at the extremities of the arc . This would be easily accomplished were the ... angles of which are either measured or computed , so that the length of the arc is ascertained with much laborious ...
Page 52
... 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 observers under the same meridian ...
... 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 observers under the same meridian ...
Page 67
... angle of 28 ° 10 ′ 44 ′′ -5 ; in consequence of this obliquity of position , they always appear elliptical to us , but with an excentricity so variable as even to be occasionally like a straight line drawn across the planet . In the ...
... angle of 28 ° 10 ′ 44 ′′ -5 ; in consequence of this obliquity of position , they always appear elliptical to us , but with an excentricity so variable as even to be occasionally like a straight line drawn across the planet . In the ...
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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