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Wants information regarding undulatory theory of light controversy and the role of Lord [Henry ] Brougham for his obituary. Congratulates good performance of JH's son [John?] in India.
Discusses Lord [Henry ] Brougham and his optical papers. Thanks ES for kind remarks regarding JH's son [John?]. Discusses polarization of corona.
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.
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.
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.
Asks JH to sign [C. P. B.] Walker's certificate for the R.S.L.