Discusses relationship of subsidence to the formation of coral reefs.
Discusses relationship of subsidence to the formation of coral reefs.
Francis Beaufort has instructed ABB to order three copies of Coral Reefs.
About eclipse observations of 1842, together with JH's speculations about the existence of an atmosphere around the sun. Enclosed is an eclipse drawing by Francis Baily.
Thanks for RH's paper on mineralogy. JH has explored use of mercury together with iron in photography.
Has sent the papers on the eclipse to G. B. Airy.
Would like JH's views on the suitabilities of the various makes of telescopes for their observatory.
Does not feel qualified to judge the merits of the various makes of telescopes. Suggests that the Astronomer Royal may be able to help or one of the other observatories.