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Asks JL to take on the preparations for the magnetic observations, including the instructing of ships' personnel.
Has just done photographic experiments using bromine paper, and is very pleased with them. JH notes in a postscript that he had just received a letter from W. H. Fox Talbot stating that Fox Talbot had just discovered bromine paper as well.
About observing binary stars. JH has decided not to accept the offer of passage on a war ship to the Cape of Good Hope, as he wishes to be beholden to no one for the results of the expedition.
Thanks for work on lunar theory. Sends news from Feldhausen, noting 'latest Astronomical novelty,' the sudden growth of star Eta Argus.