Postpones visit of Lady [Margaret] Herschel to CW. Wishes to take CW's Symphonion to Slough. Has made favorable mention of CW's tuning fork experiments in paper on absorption [JH's 'On the Absorption of Light by Coloured Media...'].
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Postpones visit of Lady [Margaret] Herschel to CW. Wishes to take CW's Symphonion to Slough. Has made favorable mention of CW's tuning fork experiments in paper on absorption [JH's 'On the Absorption of Light by Coloured Media...'].
Invites CW to Slough to demonstrate CW's 'elegant experiments on light & sound.' Will need time to get JH's electric machine in order. Asks for copy of CW's paper on Jew's harp.
Comments on CW's work on light and on the velocity of electricity. JH's ruminations lead him to the idea of motion pictures.
Arranges a meeting with CW and Edward Sabine to prepare a report on magnetic proposals.
Too ill to attend a demonstration by CW of one of CW's instruments [?].
No summary available.
Discusses when and how often R.S.L. committees, particularly the physical committee, should meet.
Arranges a meeting with CW and Edward Sabine to discuss Kew [magnetic] observations.
Received prospectus of Kew observatory. Its objectives seem incompatible. It appears better suited as experimental institution. Refer Francis Beaufort to JH's 11 Oct. 1835 letter to Beaufort defining physical observatories.
Sends CW a specimen of JH's 'mercurial photographic process.' JH is pleased that W. H. Fox Talbot received the Rumford medal.
Recommends Robert Hunt to fill the professorship at King's College, left vacant by the death of John F. Daniell.
The continuation of magnetic and meteorological observatories is under question, and CW's instrument for observing atmospheric electricity should be part of the discussion.
Makes some amendments in JH's request for information [see JH's 1845-4-6].
Asks for CW's contribution to the Admiralty's scientific manual.
Strongly supports W. E. Weber as the best candidate for the receipt of the Rumford Medal [see CW's 1849-11-10].
Invites CW to come out to Collingwood next week when some other friends are coming, too.
Is pleased CW is coming [see JH's 1849-6-29]; JH asks CW to bring some of his apparatus to do polarized light experiments.