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Continues opposed to application to government to support the 'Great Southern Reflector' [see JH's 1849-10-27]; responds to a number of specific queries about the construction of such a telescope.
Thanks for several papers; JH describes article on telescopes he has prepared for the Encyclopaedia Britannica.
Congratulates TR on his volume of astronomical observations. Skeptical about alleged changes in Orion nebula. Feels better telescopes and drawings would be needed to confirm this. Discusses own double star observations.
Will not urge government to construct a great reflector at the Cape; believes it should be done through private funding; does look forward to the time when his work on southern skies will be reexamined. [See TR's 1849-10-21.]
Discusses the possibility of a large reflecting telescope being constructed for observation of the southern heavens.
Thanks TR for his paper on magnetism and his article on speculae. Discusses [J. P.] Gassiot's work on galvanic stratification. JH's health is better.
Thanks for notice on first performance of Melbourne telescope and its contributions to knowledge about nature and role of nebulae. Comments on relationship of nebula and apparently associated stars. Looks forward to report on Magellanic Clouds.