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Enquiry (from stranger) re: Poisson's definite integral of equation [given]. Cannot verify it.

See 36/18/3 for French translation. Acknowledgement of CD's calculation of secular acceleration of moon's mean motion by Poisson's method. Thinking of sending four different methods of calculation of same for inclusion in Nautical Almanac. Pontecoulant unlikely to be persuaded of JCA's and CD's method. LeVerrier likely to come to unpleasant discovery of the truth.