When they last met, JH had promised to show him some of the wonders of his 20-ft. reflector. Is in town for a few days and would welcome the chance of visiting him.
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Is proposing to visit the continent after the Oxford meeting to make observations and intends taking some meteorological instruments. Would like JH's advice on some points regarding the large thermometer filled with a blue liquid.
In preparation for foreign travel, asks JH about instruments and method for measuring radiation.
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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.
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.
Regarding JH's actinometers, intends to compare their results when in Switzerland and would be pleased if JH has any determinations on them. Outlines the plan of his experiments. Thinks JH should publish an account of them before JF publishes the results of his experiments. Met L. A. J. Quetelet in Brussels. Intends visiting the Pyrenees.
Suggests that JF use his instruments to compare the force of solar radiation at high and low elevations. Delineates possible methods for this experimentation, and lists results of similar experiments. Includes further information on the actinometer.
Has postponed answering his letter until he has some worthwhile results to transmit. Local savants are unwilling to take much trouble but has met a German meteorologist, L. F. Kämtz, and together they have carried out observations on some of the mountains. Encloses some of the actinometer readings. Has 80 series of magnetic observations.
Returned suddenly from the continent and found JH's letter to his brother awaiting him. Outlines his reason for applying for the vacant post at the University and would welcome a testimonial from JH. Brewster is his chief rival. Gives a few observations on his recent trip to the continent.
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.
Is sorry to trouble him again but would like a letter from JH that he can print with his testimonials, as David Brewster has now printed JH's letter, also [William?] Ritchie. Awaits the results before setting out for Europe.
Is drawing up a new actinometer and comments on JF's ideas about it. Encloses a letter to JF's brother.
Sending a copy of his testimonials and one of his reports on meteorology. Was elected to the chair of Natural Philosophy by a majority of 21 to 9. His cousin Leslie Melville hopes to be able to provide JH with letters before JH's departure for the Cape.
Congratulates JF on obtaining, after some difficulty, the Chair of Natural Philosophy at Edinburgh. Accepts offer to discuss meteorology with JF's relation Leslie Melville[?], and hopes to mention his actinometer.