Historical determinations of the Earth's radius and flattening
Table
Historical determinations of the Earth's radius and flattening
author year method equatorial radius (in metres) l/f*
P. Bouguer and P.-L. M. de Maupertuis 1735–43 arc 6,397,300 216.80
G.B. Airy 1830 arc 6,376,542 299.30
A.R. Clarke 1866 arc 6,378,206 295.00
F.R. Helmert 1884 gravimetric 299.25
J.F. Hayford 1906 arc 6,378,283 297.80
W.A. Heiskanen 1928 gravimetric 297.00
H. Jeffreys 1948 arc 6,378,099 297.10
*Flattening denoted by f.
See as table:
- Endō Shūsaku
- Energia
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- energy, conservation of
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