Letter, from Francis Beaufort to Sir John Herschel, dated at Admiralty Autograph letter signed by sender. Sending more barometric observations. Interesting articles by S. D. Poisson and D. F. J. Arago. Peculiar crimson light seen in the sky recently. The 'Beagle' will sail in May and will call on John Frederick William Herschel. 23 February 1837