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Copy of letter to J.W. Lubbock

Comments on Pontecoulant's comments on JCA's work on the secular acceleration of the moon's mean motion. To be transmitted to Pontecoulant if JWL thinks proper.

Adams, John Couch (1819-1892) astronomer

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

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