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Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)

Johnson, Frank G., 1835- · Chicago, A.H. Andrews · leaf 438

An illustration from Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families, 1878, leaf 438
volves, is always situated in one of the two foci of theellipse. The revolving body, therefore, is sometimes nearer to the centralbody than at others. For example, the body, S, Avhich may representthe earth, is nearer to the sun than when it is at T. The orbits of some ASTRONOMY. 431 bodies are… … (Fig. 4) passes through the centre of the orbit, and the distance fromthe centre of this line to the centre of the sun below it, is the eccentrici-ty of the orbit. The eccentricity of the orbits of the several planets, expressed inmiles, is as follows: Mercury 7,000,000 Venus 492,000 Earth…

Physics · Astronomy

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