Outlines the difficulties he has had to return JH's actinometer. Gives details of his observations in the Alps. Comments on the chronometer used.
Showing 41–60 of 146 items
Outlines the difficulties he has had to return JH's actinometer. Gives details of his observations in the Alps. Comments on the chronometer used.
Sending observations of his barometrical observations made during the summer at Chamouny. Comments on them and the work of [Alfred?] Gautier.
Sends copies of a paper to JH and D. F. J. Arago on a chemical experiment being conducted at the Institute of France. Asks JH to present it to the R.S.L.
Discusses comet observations, together with variations from different observers. HO offers some historical fragments about the planet Venus, and about the Lilienthal telescope.
Comments on the observations JH has made with his 20-foot telescope, especially nebulae. HO provides some of his own observational data of Comet Encke.
Is afraid JH will decline the invitation to be a candidate for the Lucasian professorship, so it is assumed Charles Babbage will be elected.
Urges JH to miss the next R.S.L. Council meeting, as many friends have been to see Charles Babbage, and are proposing to make the meeting difficult. GB suggests that JH remain at Slough because of his mother's illness.
Thanks JH for his assistance with edition of William Herschel's writings [see JH's 1824-6-30]. JP indicates volume two is ready for submission to printer.
Needs money to employ men working on Charles Babbage's calculating machine.
Dionysius Lardner is candidate for Dublin Observatory. Please send Edward Sabine's paper on longitude.
Comments on [Pierrre] Guinand's glass making process. Believes the glass made Guinand's way will be too expensive [see JH's 1827-10-20].
Writes in favour of a London University professorship for Thomas Key. Refers to some optical experiments of Michael Faraday, and extends solution of conic section problem first raised in WT's letter of 1826-2-27.
Describes prismatic spectrum of flame of cyanogen and offers to repeat experiment with Michael Faraday for JH's benefit.
Queries and comments about telescopes and microscopes; some thoughts about a diffraction grating.
Asks JH to clarify what goods are his from a joint order with WT from a German optical firm.
Renders an accounting of expenses for optical goods received from Germany.
FB pleased by JH's note yesterday announcing JH's resignation [as secretary of] R.S.L. Hopes JH will accept 'another office' in R.S.L. at future date.
JH's resignation as R.S.L. secretary. Reports finding papers. Will confirm that Greenwich observations reached Thomas Henderson. Thermometers and [John] Dalton's Elements arrived safely. Thanks for invitation to visit Slough.
Regrets JH's resignation as secretary of R.S.L.
Regrets what MPH told JH yesterday about Slough estate. If JH receives good offer, he may do what he judges best.