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Sends continuation of Belgian meteorological observations. Just finished magnetic observations. Plans to continue certain ones. Regrets being alone, without aids, 'in front of the transit instrument, the mural circle and the equatorial.'
Addresses a few last words before departing for Italy with his wife. Sends 3 memoirs just published. Will be in Paris to observe meteors. Proposes to redo terrestrial magnetism observations in Italy.
Is comparing 'points and measures' of new stations with [François] Arago. Also busy with daguerreotypes. Thanks for encouragements. Has necessary instruments for meteorological and magnetical observations. Mentions work done and astronomers met on Italy trip. Discusses Prince Albert.