Wrote to [A.] Sawitsch regarding Russian pendulum experiments. Encloses Sawitsch's reply. Discusses experimental possibilities.
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Wrote to [A.] Sawitsch regarding Russian pendulum experiments. Encloses Sawitsch's reply. Discusses experimental possibilities.
Agrees that the pendulum should be observed at major Indian stations because Russians did not avail themselves of offered vacuum apparatus and pendulums.
Sends [Warren] de La Rue's letter on Southern[?] Telescope for JH's review. Swedish Academy working on reviving project of measuring arc of meridian.
Returns [Warren] de La Rue's letter and discusses its contents, especially the making, mounting, and mirror for de La Rue's reflecting telescope.
Expresses interest in Swedish plan to survey Spitzbergen and to measure meridian of arc. Discusses gravitometer being developed by [Jacques] Babinet.
Describes pendulum design. Believes [Henry] Kater's is the best. Regrets Russians want to make own pendulum. Discusses nominees, including [G. P.] Bond, for R.S.L. foreign membership.
Supports G. P. Bond of Harvard College for foreign membership of R.S.L.; proposes H. E. Sainte-Claire Deville for the Rumford Medal, for his development of a high temperature laboratory furnace applied to metallurgy and the 'disseverance' of the hydrogen and oxygen of water.
R.S.L. Council has decided to publish correspondence regarding the Melbourne telescope. Sends early pages for JH's corrections.
R.S.L. Club locale changed to St. James's Hotel. Wants JH's advice on two papers ES is writing on results from Kew Observatory.
Accepts invitation to dine with ES. Working on sixth edition of Outlines Astr. Has sent argument against converting to metric system to Leeds.
JH to read his paper on nebulae Thursday, 19 Nov. Dinner will be at St. James's Hotel.
Had hoped to attend ES's soiree, but has influenza. Praises ES's report on Mr. McClintock's magnetic observations at Port Barrow.
Encloses description of Col. [J. T.?] Walker's experiments. Asks for JH's opinion of these.
Pendulum experiments to be conducted at stations of Great Indian Trigonometrical Survey.
Plans to confer with [J. T.] Walker and F. A. T. Winnecke from Pulkovo to learn of Russian pendulum experiments before reporting to R.S.L. council. J. H. Pratt's measurement of polar axis and theory about earth's center of gravity.
Gives reasons for and discusses technicalities of supporting pendulum experiments at astronomical and geodesical stations in Indian trigonometrical survey.
Asks whether Greenwich Board of Visitors should meet to answer communication from Admiralty or if a response could be circulated among Visitors and sent if it meets with approval.
Encloses proposed resolution to controversy over whether to build railway tunnel under park. Will be unable to attend meeting because of chronic bronchitis.
Visitors Board will meet to discuss railway companies' proposal to remove Greenwich Observatory to another site. Includes copy of Warren de La Rue's letter to ES.
Objects to plan to move Royal Observatory to site other than Greenwich, but will defer to G. B. Airy's opinion. JH's deteriorating health.