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Comments on a proposed request for a government grant to establish a magnetic and meteorological institute.
Has written a letter to Lord John Russell outlining the case of Andries Stockenström. Does not wish to become involved in Cape politics or the affairs of the Anti-Slavery Society much as he appreciates their importance.
Tells WT about JH developing the thermographic paper which is susceptible to 'calorific' and 'chemical' rays of light.
The Physical [?] Committee is meeting the next day to deal with the question of establishing a magnetic and meteorological observatory. JH [Chair of the Physical Committee?] cannot attend the meeting and sends his supportive, but cautioning, comments.
Exchanging further information on several aspects of the photographic process [see RH's 1840-4-15].
Feels unable to become a member of the new society proposed by Halliwell, but wishes it well.
Indicates travel plans, including a visit to FB, with a side trip for business to Slough. JH comments on some astronomical observations he has received.
Having heard that HP had expressed pleasure at some of JH's colored photographs, JH sends some more recent ones.
A series of 'resolutions to be proposed as fundamental principles for a reform of the Southern constellations.'
Has not had time to work on the constellations paper because of interference due to tithe surveys and land re-assessments, which JH fears may involve a lawsuit.