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" Since an oblate spheroid is generated by the revolution of an ellipse about its minor axis, the equator and all the sections of the spheroid parallel to the equator are circles, and all sections made by planes passing through the axis of revolution are... "
An Introduction to the Elements of Practical Astronomy - Page 3
by James R. Christie - 1853 - 118 pages
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Elements of Plane Astronomy

John Brinkley - Astronomy - 1836 - 287 pages
...if the earth had been originally in a fluid state, its form would be accurately that of a spheroid, generated by the revolution of an ellipse about its minor axis. The proportion of its diameters would then be readily investigated from a comparison of the lengths of...
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The Geology and Extinct Volcanos of Central France

George Poulett Scrope - Geology - 1858 - 258 pages
...accumulate round the margin of the orifice into a hill, necessarily approaching more or less in figure to the solid which would be generated by the revolution of an obtuse scalene triangle round one of the angles of its base; and this hill is called a volcanic cone,...
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The Geology and Extinct Volcanos of Central France

George Poulett Scrope - Geology - 1858 - 258 pages
...accumulate round the margin of the orifice into a hill, necessarily approaching more or less in figure to the solid which would be generated by the revolution of an obtuse scalene triangle round one of the angles of its base ; and this hill is called a volcanic cone,...
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A Manual of Spherical and Pratical Astronomy: Embracing the ..., Volume 1

William Chauvenet - 1864
...to apply. The figure of the earth is very nearly that of an oblate spheroid, that is, an ellipsoid generated by the revolution of an ellipse about its minor axis. The section made by a plane through the earth's axis is nearly an ellipse, of which the major axis is the...
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A Manual of Spherical and Astronomy: Embracing the General ..., Volume 1

William Chauvenet - Astronomical instruments - 1864
...to apply. The figure of the earth is very nearly that of an oblate spheroid, that is, an ellipsoid generated by the revolution of an ellipse about its minor axis. The section made by a plane through the earth's axis is nearly an ellipse, of which the major axis is the...
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An introduction to plane astronomy

Philip Thomas Main - Astronomy - 1868 - 192 pages
...have stated that the Earth is almost a sphere : its exact figure is an oblate spheroid, i. & a figure generated by the revolution of an ellipse about its minor axis. The minor axis of the ellipse, or the shortest diameter of the Earth, is about 7900 miles, and is less...
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A reference-book of modern geography

Alexander Charles Ewald - 1870
...earth's curvature. The shape of the earth is very nearly that of an oblate spheroid, that is, the solid generated by the revolution of an ellipse about its minor axis. The earth has a continual motion of rotation, which is performed once in every twenty-four sidereal hours,...
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The Elements of Theoretical and Descriptive Astronomy: For the Use of ...

Charles Joyce White - Astronomy - 1872 - 272 pages
...at the extremities of which the curvature is the greatest. The form of the earth, then, is that of the solid which would be generated by the revolution of an ellipse about its minor axis, which solid is called in Geometry an oblate ttpheroid. A more common but less accurate name given to...
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The Elements of Coordinate Geometry: In Three Parts: 1. Cartesian Geometry ...

De Volson Wood - Geometry, Analytic - 1882 - 333 pages
...— (5) which is the equation of the surface of the prolate ellipsoid. 232. The Oblate Ellipsoid may be generated by the revolution of an ellipse about its minor axis. Let the axfs of s be the axis of revolution. Then proceeding as before, we have (6) 233. The Ellipsoid...
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Van Nostrand's Engineering Magazine, Volume 22

Engineering - 1880
...Written for VAN NOSTRAND'S MAGAZINE. II. — THE EARTH AS A SPHEROID. As an oblate spheroid is a volume generated by the revolution of an ellipse about its minor axis, the equator and all the sections of the spheroid parallel to the equator are circles, and all sections...
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