Comments on some ideas of J. B. Lamarck, and about large fossil remains apparently found.
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.
Will forward Astronomische Nachrichten to JH and Astronomical Society. Comments on quality of [Joseph] Fraunhofer's micrometer, which has only the wires illuminated. [C. F.] Gauss uses a theodolite to determine the angle of the telescope.
Hopes to see JH on JH's return visit to Geneva. Encloses quartz specimen, amethyst crystal. Sends regards to Charles Babbage.
Encloses differences determined through indications of portable barometer, standard, thermometer, and various other instruments.
Praises JH, JH's father, and their telescopes highly. Asks JH not to forget commission to FS.
Relieved that JH has returned safely from his European tour.
Hopes that JH will help her to finish a catalogue of 2500 nebulae that she and William Herschel began but never completed.
JH will have little time for astronomy due to election as Secretary to the R.S.L.; the appointment also has forced JH to move from Slough to London.
Happy to be reunited with mother. JH thanks CH for his enjoyable stay in Hanover. Wishes CH well on her [catalogue of] nebulae.
Decides not to go to Switzerland because he wants to visit Hanover. On the way, hopes to see Johann Pfaff at Erlangen, Johann Encke at Seeburg, Baron Bernhard von Lindenau at Gotha, and Carl Gauss and Karl Harding at Göttingen among others.
Describes his laborious journey to the summit of Mt. Etna; from his barometric readings, concludes that its altitude is 10,000 or 11,000 ft. Asks about the progress of Johann Pfaff's translation of William Herschel's papers; JH mentions that he wrote to Pfaff from Cattagione, Sicily. [Letter continued 20 July from Naples and 16 Aug. from Florence.]
Thanks FB for informing him of his election to the Astronomical Society.
Presents JH with his solution to a mathematical equation in finite differences; asks for JH's solution.
Invites JH to dinner.
Regrets missing JH's visit. Refers JH to [Charles] König for admission to Department of Natural History at the British Museum.
Requesting information of the dispersion of rays in Crown and Flint glass.
Description of theory of a telescope, though not practical yet.
Concerning calculations for the parallax of Mars.
Regarding the First Assistant at Greenwich Observatory, and the possibility of JH ever becoming Astronomer Royal. Hopes to see him on Wednesday.