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Is grateful for JH's letter and offer of assistance. Will come to London earlier than expected so that he can call on him and discuss his problems before foreign travel. Would be glad of an introduction to Mario Gemmellaro and other scientists JH thinks would help him in his studies.
Offers JF advice about the telescope mirror [?] and looks forward to seeing JF on his way to France.
Is drawing up a new actinometer and comments on JF's ideas about it. Encloses a letter to JF's brother.
Pleased to hear JH's work is progressing. Disappointed with Dr. [John] Davy's meteorological observations at Malta. Comments on other scientific news, including recent eclipse, [Andrew] Crosse's controversial artificial crystals at Bristol B.A.A.S. meeting, JF's 1832 observations in Switzerland, and William Whewell's and William Buckland's books.
Discusses prospects for meteorological committee of B.A.A.S., on which they both will serve. Lacks time for it. Does not need hourly observations made by Committee of Physico-Mathematical Society of Edinburgh.
Gives JF permission to use JH's letter to JF's brother in any way JF sees fit to obtain the Chair of Natural Philosophy (at Edinburgh), but still does not wish directly to promote JF's selection. Briefly discusses results of JF's experiments with the actinometer.
Mentions letter from William Whewell sending JF JH's interesting but puzzling meteorological results. Will communicate them to a Dr. [John?] Davy at Malta. Has been busy preparing lectures. Made a short tour in England last summer. G. B. Airy has been awarded the Lalande Medal.
Unable to assist JH's friend Major [Abraham] Cloete as JF was away from home. Comments on results of JH's table and JF's own papers and scientific occupations. B.A.A.S. would welcome JH's ideas for meteorological work. S. D. Poisson has published a new work on heat, in which he attacks J. B. Fourier.
Discusses methods of magnetic observation, JH's actinometric readings in the Cape, and the need for more physical observatories.
In preparation for foreign travel, asks JH about instruments and method for measuring radiation.
Sends thanks and congratulations for paper verifying electric origins of all magnetism. Will give JF an actinometer with complete instructions. Includes some instructions for obtaining and using it. Sends regards to Mario Gemellaro, should JF go to Catania.
Writes 'in haste' to thank JF for a pair of papers. Comments on Louis Daguerre's pictures in Paris.