Is anxious about his aunt Caroline Herschel and would like news of her health.
Is anxious about his aunt Caroline Herschel and would like news of her health.
Comments on some papers on vision and photography by Mr. Moser, and compares this with some of JH's own writings on the subject.
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.
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 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.
Has written to G. B. Airy. Regarding the various reports of the recent eclipse.
Thanks AD for the corrections to JH's writing on astronomy; congratulates AD on his book on differential calculus.