Gives a formula related to a table published in the Nautical Almanac, which table listed various stellar observations made by John Pond.
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Gives a formula related to a table published in the Nautical Almanac, which table listed various stellar observations made by John Pond.
Sends an abstract of his paper on observations relating to the practical construction of telescopes [JH's 'Practical Rules,' 1822]. Would like 25 copies for distribution. His recent experiments with polarized light.
J. J. von Littrow delighted with clock sent by M & C and commissions JH to order another for L. A. Fallon, director of Great Austrian Trigonometrical Survey. Describes modifications. Contact Littrow for further details.
Sends some calculations relating to the construction of lenses.
Some comments on sun spots based on William Herschel's ideas; considering a collection of William Herschel's writings but publishers not interested.
Events at Cambridge. Has a paper by A. L. Cauchy for him. Has met Humphry Davy and discussed CB's machine. CB is celebrated in verse.
Writes to acknowledge the receipt of a volume of the Transactions of the Philosophical Society of Philadelphia.
WS was elected associate of Astronomical Society. Distributed books as WS directed. Will send JH's and James South's observations of double stars when printed. Neither Thomas Young nor William Herschel received WS's Dorpat observations.
Received the letter. Hopes he will be successful in his application for the position of Actuary to the Law Life Society. Has a high opinion of his mathematical papers and has used his system in his own works.
Will attend meeting of Lord Mayor's Committee to rebuild London Bridge.
Will send MS's communication about the theory of caloric to some scientific journals, rather than the Astronomical Society, where it would be inappropriate. Comments on caloric theory.
Forwarding to DB, through Hans Christian Oersted, a paper on caloric by Marc Seguin.
Has signed the paper regarding the machine and is returning it. Regarding its publicity with Members of Parliament.
Regarding the Chancellor of the Exchequer and the calculating machine. Recent astronomical observations.
'Our micrometer screws' are not in error. F. G. W. Struve's star measurements using Josef Fraunhofer's repeating micrometer agree well with JH's. So error must be in HK's observations.
Researching double stars. Comparing his finding to William Herschel's, finds that most are compatible. The 40-ft. reflector is unusable, but hopes to try the 20-ft. Heard that WH's papers will be translated into German; wishes Johann Pfaff to undertake it. Asks CH to send him a copy of the finished translation.
Letter of introduction to Mr. Robison, son of Edinburgh professor. Thanks PL for sending JH books 11 and 12 of LP's Mécanique céleste. Hopes to see PL's 'perturbations of Ceres and [J. F.] Encke's Comet.' JH's and James South's work on double stars verified views PL once held. Hopes François Arago will publish observations of double stars.
Comments favorably on a method developed by WW for designating the faces of crystals. Presents a method JH had worked out previously, but writes on the letter: 'Not sent—On rereading his letter I find it is his idea—strange!'
Praises and comments on some proposals made by WW for designating the faces of crystals. Urges him to present his method to the R.S.L.
Sends packet of books and papers for delivery to J. W. A. Pfaff, copy of JH's 'Essay on Physical Astronomy,' and JH's and James South's work on double stars. Promises to send biographical notice of William Herschel. Astronomical Society received HS's 'Schreiben en Dr. Olbers.'