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Delaunay, Charles-Eugène (1816-1872) astronomer and mathematician
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Draft autograph letter signed to Simon Newcomb

Proper comparison of Hansen's and Delaunay's equations of Longitude, Latitude and Parallax [of the moon] much needed. Description of such comparisons as already exist. JCA's own parallax tables. Tables of Moon's Ephemeris might be obtained from Hind: JCA will enquire. Hill's computation of the perturbations of Jupiter and Saturn very worthy.

Adams, John Couch (1819-1892) astronomer

Autograph letter signed to J.C. Adams

Tables of moon. Delaunay. Secular acceleration of the moon's mean motion: letters of Plana. Letters of Airy and Whewell to return to JWL.

Lubbock, Sir John William (1803-1865) 3rd Baronet, astronomer and banker

Autograph letter signed to J.C. Adams

The moon. Work completed by Delaunay. Seeks papers by JWL. JWL seeks corrections by JCA to paper of Plana to send.

Lubbock, Sir John William (1803-1865) 3rd Baronet, astronomer and banker

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