Has received the regulations of the Astronomical Society of London—a great encouragement to astronomers. Has made observations on the orbit of the comet. Has sent two memoirs to T. M. Brisbane.
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Has received the regulations of the Astronomical Society of London—a great encouragement to astronomers. Has made observations on the orbit of the comet. Has sent two memoirs to T. M. Brisbane.
Introducing his friend Mr. De Lavigne, who is visiting England. Mentioned him in his memoir on the Measure of the Arc.... Gives news of his own astronomical work. Edward Sabine arrives at the end of the month. Has obtained remarkable results with his two pendulums.
Has received the actinometer safely by the hand of Mr. De Lavigne, also the instructions. Hopes to use it in the Alps, and will send some observations. De Lavigne was enchanted with England.
Has just returned from the Alps, where he worked on the glacier at Chamouny and in the St. Bernard. Comments on his work and on the work of the actinometer. Regrets to hear of the death of Mrs. Babbage.
Outlines the difficulties he has had to return JH's actinometer. Gives details of his observations in the Alps. Comments on the chronometer used.
Sending observations of his barometrical observations made during the summer at Chamouny. Comments on them and the work of [Alfred?] Gautier.
Introducing a Mr. Lerebours, son of the optician at the Bureau des Longitudes, who is on a visit to England. Hopes JH has received the copy of JN's work on geometry, written in a new way.