Thanks RM for copies of CD’s article on geology in the Admiralty scientific manual [J. F. W. Herschel ed., A manual of scientific enquiry (1849)].
Thanks RM for copies of CD’s article on geology in the Admiralty scientific manual [J. F. W. Herschel ed., A manual of scientific enquiry (1849)].
Regrets he is unable to correct his "little manual" ["Geology" in Manual of scientific enquiry (1849)]. Recommends that John Phillips revise it.
Asks RM to forward letter [see JH's 1844-7-22] immediately to G. B. Airy.
Thanks for the receipt of the Radcliffe catalogue of stars, but wishes observations had been equatorial rather than circumpolar.
Suggests an observational program for RM's newly purchased transit circle [see RM's 1861-10-21].
Thanks RM for the double star observations he has sent.
Sends RM a copy of Angelo Secchi's double star observations pointing to a very large number of calculation errors.
Seems to JH to be some systematic error in some of RM's observations; JH includes examples.
Thanks RM for his offer [see RM's 1869-1-26]; wishes astronomers would develop an accepted system of indicating the quality of observations.
Directs RM and Charles Pritchard to examine late JH's manuscript on history of double stars, sent to Radcliffe Observatory.