Passes on the suggestion, from G. B. Airy, of the use of copper rings for damping the movements of measuring instruments in measuring terrestrial magnetism.
Passes on the suggestion, from G. B. Airy, of the use of copper rings for damping the movements of measuring instruments in measuring terrestrial magnetism.
About arrangements for the publication and distribution of JH's Cape observations.
[Richard] Jones's view is correct. Will wait to hear what Mr. [Meade?] has to say, before JH writes to Mr. Hodges.
Sent WT's specimens to J. B. Biot and F. J. D. Arago in Paris. Developed paper sensitive to heat rays of sun 'beyond the spectrum.' Diagram of three spectra: 'luminous, chemical, and thermic.'
Commends JW's application for Savilian professor of astronomy at Oxford [see JW's 1839-3-22]. But it is improper for JH to propose JW unless asked to do so by R.A.S. council.
Thanks for specimen of light sensitive paper. Provides hint on the chemical process that Louis Daguerre may have used in his photographic work. Sends specimens of JH's own work.
Describes method of varying the size of photographic images. Praises Talbot's light sensitive paper and suggests improvements regarding it. Complains about persons too ready to seek a patent.
Discusses prospects for meteorological committee of B.A.A.S., on which they both will serve. Lacks time for it. Does not need hourly observations made by Committee of Physico-Mathematical Society of Edinburgh.
On instruments for fixed stations. Fears that naval expedition will be detained.
Prepared to send to CH copies of the Index to John Flamsteed.
Asks JE to express JH's gratitude to the Royal Academy of Berlin for electing JH a foreign member. Discusses JE's observations of divisions in the ring of Saturn, JH's sightings of Saturn's satellites, the British Antarctic expedition, and comets.
Declines RM's request that JH become a candidate for Oxford's Savilian Professorship [see RM's 1839-3-27]. JH plans to move farther from London.
Asks WW to approve cost of report forms to be sent to the Breslau Observatory. Has heard that WW's book is nearing completion and contains 'heresy.' Has just submitted a paper on 'photographical matters' to the R.S.L.
Informs WW about various matters relating to James Ross's expedition. Is considering purchasing a house in Kent.
Thanks WW for some verses. Informs him that James Ross's expedition has been approved. Discusses various aspects of the expedition, e.g., the placing of instruments on Van Diemen's Land [Tasmania].
Has sent on one of EH's two letters to Cape Town. Reports on meteor showers, especially meteors seen on 14 Nov. 1837. P.S. adds that JH has received a number of papers by EH.