Sends GA information about indices of refraction in different glasses and in different parts of the spectrum; also recommends the writings of Josef Fraunhofer.
Sends GA information about indices of refraction in different glasses and in different parts of the spectrum; also recommends the writings of Josef Fraunhofer.
Sends notes on a paper which are to be submitted to James South. Also included [?] are copies of the paper for JH. Attached is a note by JH about the papers of JH's father, William.
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.
On JG's concern for JH's well-being.
Requests answer to JP's earlier letter. Observations of photospheres around planets and satellites.
Has just received his letter and Struve's observations. Comments on these and those of F. W. Bessel.
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.
Description of theory of a telescope, though not practical yet.
Urges that JS not get so emotionally involved in issues concerning astronomers. 'For my own part I mean to make Science my amusement, not my business....' Comments on JS's relations with John Pond.
Is sending a letter from Dr. John Brinkley, and the corrected elements of the comet.
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.
Tour notes composed to assist JH's travels in Sicily.
Acknowledges receipt by Jameson & Aders of Astronomical Society's 1824 gold medal, to be delivered to J. F. Encke in Gotha. [JH annotation: Encke confirmed receipt of medal.]
Is leaving from Cambridge. Hopes that he will come. Has some new things on functional analysis to discuss.
Enclosing a draft for his dividend, which he hears will be the last. Hopes he changes his fellowship for a better one, but would be pleased if he would delay his decision for a while.
Regarding the change of ownership and policy of the Edinburgh Philosophical Journal. Would like a paper from him for the first number. Marked 'Private.'
Observations of Venus by William Herschel and JH. Only J. H. Schröter claims to have seen 'deep marginal indentations' that JP claims.
Please recommend London instrument makers to supply new Edinburgh observatory. Josef Fraunhofer was asked to make only lens for transit instrument, but wants to make entire instrument. [JH annotation: Recommended Fraunhofer for entire transit instrument and Robert Molyneux for clock.]
Henry Kater's triangulation survey of north Scotland. Edward Sabine's study of pendulum lengths at various latitudes. François Arago did not receive letters from JH and Francis Baily. Comments on rumor of [Isaac] Newton's madness. JH plans to reduce transit observations of fixed stars at Greenwich since [James] Bradley's time. Are French and other astronomers in agreement on common system of reductions? Will visit Paris next month. Observed curious phenomena in voltaic electricity.