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Promises in her next letter to comment about JH's 'chrysotype' photographic process.
The Smith, Elder & Co. account for the first number of part five of the Zoology, now published, is presented.
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[To JC as Secretary, Society for the Diffusion of Useful Knowledge:] Thanks for offer to send a copy of Augustus De Morgan's Differential and Integral Calculus.
Describes the total solar eclipse seen by Francis Baily at Pavia and George Airy at Turin. They were thrilled to witness three purple flames from the blocked sun emerge around the edge of the moon. Thirty more Cape Town sweeps remain to be reduced.
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Seeks to clear up confusions about various photographic processes, e.g., the Chrysotype process, developed by JH, about which confusions arose from earlier reports on them in the Athenaeum.
Gives the height of Shrewsbury above sea-level.
Congratulates HES on producing an authoritative document [BAAS committee report on zoological nomenclature].
Has been to N. Wales looking at glacier traces described by W. Buckland, which are most interesting and clear. Has written an article on what he saw ["Ancient glaciers of Caernarvonshire" (1842), Collected papers 1: 163–71].
Has been unable to make many readings with the actinometer. Is expecting some irregular readings with the magnetometers. Survey of South Africa appears very distant. Relates recent events in Natal and with the Boers.
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