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Updated: April 30, 2025
The smallness of the outstanding uncertainty can be judged of by comparing J. B. Listing's with General Clarke's results, published in the same year . Listing stated the dimensions of the terrestrial spheroid as follows: Equatorial radius = 3,960 miles; polar radius = 3,947 miles; ellipticity = 1/288·5. Clarke's corresponding figures were: 3,963 and 3,950 miles, giving an ellipticity of 1/293·5.
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