Letter, from James David Forbes to Sir John Herschel, dated at London Autograph letter signed by sender. 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. 12 August 1836