Believes "absurd letter" hastily read at last Geological Society Council meeting was from Charlesworth’s solicitor. Suggests that it may have been sent to entrap the Council and that it should be read over carefully.
Believes "absurd letter" hastily read at last Geological Society Council meeting was from Charlesworth’s solicitor. Suggests that it may have been sent to entrap the Council and that it should be read over carefully.
Has passed on the papers sent by FA. Tables of chief stars. Observations on FA's letter of 28 October 1842 [see FA's 1842-10-28]. Sends observations of Orionis.
No summary available.
Comments on some papers on vision and photography by Mr. Moser, and compares this with some of JH's own writings on the subject.
No summary available.
Has arranged meeting to discuss N. L. Lacaille's observations. Sends a toy purchased in the streets of London.
Has seen G. B. Airy. No meeting at Airy's. Further regarding reports of the recent eclipse.
Unwilling to come to a meeting as JH anticipates the return of some of his children from the continent; seems considerable confusion as to who is to do what about star catalogues [see GA's 1841-7-27].
Has been working at [L. F.] Moser's experiments and believes he is wrong in considering latent light as the agent that produces the photographic image. Read a paper last evening on the subject, which will be printed. Has been producing images by the action of heat and electricity and proposes to call this process Thermography.
Is anxious about his aunt Caroline Herschel and would like news of her health.
Has written to G. B. Airy. Regarding the various reports of the recent eclipse.
Enclosing his observations of Alpha Virginis for the past year. Has been attempting some improvements in the double refracting crystal micrometer. Comments on this and his findings. Would like JH's comments.
No summary available.
No summary available.
Continues horary observations suggested by JH. Also magnetic observations. Discusses observations of migration of birds. November has been cloudy so far and meteors cannot be seen.
No summary available.
No summary available.
More about Prussian Order of Merit; further annual parallax observations, together with comments on other observations.
Responds to CM’s review of Coral reefs [Edinburgh New Philos. J. 34 (1843): 33–47].
Received JF's paper on 'thermographic process.' Believes that thermic rays were responsible for experimental results of JF, J. W. Draper, and Ludwig Moser. JH's theory of and experiments with thermic rays, which are different from 'calorific' and visible rays, in solar spectrum.