Asks RM to forward letter [see JH's 1844-7-22] immediately to G. B. Airy.
Asks RM to forward letter [see JH's 1844-7-22] immediately to G. B. Airy.
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 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.
Regrets he is unable to correct his "little manual" ["Geology" in Manual of scientific enquiry (1849)]. Recommends that John Phillips revise it.
Directs RM and Charles Pritchard to examine late JH's manuscript on history of double stars, sent to Radcliffe Observatory.