For long men thought the earth was flat. In the latter part of the 15th Century, the idea began to get about that the earth was a sphere.
As early as 1696, it was shown that the earth is not a true sphere. Various calculations have since been made of the earth's shape and dimensions.
Last week, it was announced that there finally had been an international agreement on this subject. The International Geodetic and Physical Union, meeting at Madrid, Spain, adopted the figures of Director John F. Hayford of the College of Engineering of Northwestern University, noted for his demonstration of the...
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