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Has sent money for Robert Molyneux clock care of Friess, the bankers. Is grateful for JH's trouble over the clock. Do not print certain observations he sent as they form the subject of an argument with F. X. von Zach.
Mrs. Babbage, still recuperating, wishes to visit Slough. Recent publication of Charles Babbage's book should excite insurance directors. Paper by Mary Somerville was read at R.S.L. last week. Invitation for MH to visit Somervilles at Chelsea. JH admitted to Geological Society yesterday, presided over by William Buckland. Encloses JH's diploma from Royal Academy of Copenhagen. News of MH's London acquaintances.
Comments on some ideas of J. B. Lamarck, and about large fossil remains apparently found.
Cannot find observation of comet of 1759 in [James] Bradley's papers. Discusses eighteenth-century astronomical observations. Can send JH particulars if he wants them.
Description of theory of a telescope, though not practical yet.
Concerning calculations for the parallax of Mars.
Has just received his letter and Struve's observations. Comments on these and those of F. W. Bessel.
Is sending a letter from Dr. John Brinkley, and the corrected elements of the comet.
Requests answer to JP's earlier letter. Observations of photospheres around planets and satellites.