Comments on the quality of some of the double star observations in print.
Comments on the quality of some of the double star observations in print.
Gratitude for JH's generous testimonial on RM's behalf.
Discusses Lord [Henry ] Brougham and his optical papers. Thanks ES for kind remarks regarding JH's son [John?]. Discusses polarization of corona.
Thanks for proofed pages. Received Astronomische Beobachtungen auf der Sternwarte zu Bonn. Finished determining by electric means the different observational longitudes of Leiden and Brussels.
Thanks JH for information regarding Henry Brougham [see ES's 1868-9-29 & 1868-10-8]. Also for comment on polarization of aurora. Encloses Captain [John?] Hay's letter, but not plate.
Thanks JH for his pamphlet on musical scales.
Discusses [William] Sharpey's view of JH's opinion of [Henry] Brougham's optical writings. Asks for JH's advice on presenting meteorological observations. On observations of an eclipse.
Congratulations on success in observing solar spectrum and corona. JH's views on sun's corona [with diagram]. Agrees that communications in India are abominable.
Details about sunspot observations.
Discusses papers concerning light on [William] Sharpey's list. Discusses, very critically, Henry Brougham's optical researches.
Reviews additional work of H. P. Brougham [see JH's 1868-10-1] as has been requested in preparation for an eloge . JH is critical of poorly described and poorly understood work, unrelentingly tied to Isaac Newton's corpuscular ideas.
Much obliged for his kind notes on sunspots; there has been a wonderful variety lately. Will make a study of the Julian dates. Can see the Crystal Palace fireworks splendidly from his house.
A note to accompany JH's biographical sketch of William Dawes.
Was pleased to receive JH's translation of Dante. Wished he lived near enough to pay them a visit.
Further regarding the theory of sound.
Is preparing a sketch of Sir John Lubbock for a weekly, and would be glad of JH's opinion regarding Lubbock as a man of science and his advanced political views.
Subscriptions for Sinai survey fund are nearly complete. Survey party will embark for Alexandria aboard Ripon on 24 Oct. Will send account books to JH and R. I. Murchison. Will not need JH's astronomical instrument.
Is grateful for his article on musical scales. Queries regarding musical sounds. Has had to leave his old abode due to building operations.
R. I. Murchison has forwarded JH's letter about the noises at Nakkus in Sinai. Has heard the noises several times and thinks they are caused by the movement of sand. There is much static electricity in sand.
Some photographs support the sudden disappearance of the spot on 17 Sept. Some photographs are misdated. The relation of Jupiter and sunspots suggests previously unknown interconnections in the solar system.