Encloses the second part of his paper on heat. Has procured some meteorological readings from Malta. Trusts everything is proceeding well at the Cape. Met G. B. Airy recently at Greenwich, where C. F. Gauss's apparatus is now installed. Mr. Gaubert is dead, also A. M. Ampère and G. C. F. M. R. De Prony.

Encloses observations made by some of his pupils who have now formed a physico-mathematical society.

Sending a letter via Capt. Basil Hall. Is surprised JH did not mention the starry showers of 12 Nov. in his last letter, D. F. J. Arago is investigating them. J. B. Biot has published an extension of [Denison?] Olmsted's theory. Humphrey Lloyd has produced an interesting book on the undulatory theory. What measure does JH employ for the force of the wind? Has got William Whewell's anemometer. Influenza prevalent. William Farish has been succeeded by Robert Willis.

Regrets that JH had to write another letter regarding the two papers he forwarded. Missed him when in London. Saw L. J. M. Daguerre's specimen and also those of J. N. Niepce, the latter undoubtedly the originator. Has made an excursion to the volcanic region of the South of France.