Asks JH to comment on the scientific merit of a large number of plates on solar spots sent to R.S.L. by Richard Carrington.
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Asks JH to comment on the scientific merit of a large number of plates on solar spots sent to R.S.L. by Richard Carrington.
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.
Cruel illness has kept him from work for a while. Just finished Histoire des sciences mathématique et physique chez les belges. AQ's son works with proper motion, double and multiple stars, and absolute positions.
Offers a few ideas to GA [see GA's 1863-2-9], but does not have a coherent explanation.
Will take into account JH's suggestions [see JH's 1863-2-13] and see where this leads.
Once again anxious about completion of nebula catalogue, and about cost over run [see Edward Stone's 1863-1-14].
Is sending JH the completed sheets of nebula reductions for printing [see JH's 1863-2-6].
Acknowledges receipt of nebula catalogue sheets from GA [see GA's 1863-2-6]; apologizes for JH's anxious letter [see JH's 1863-2-6].
Has found a few minor errors in the calculations checked so far [see GA's 1863-2-6]; comments on magnetic tracings JH received from GA.
Is JH interested in seeing G. F. J. A. Auwers's catalogue of JH's and William Herschel's nebulae?
Might have saved JH some work if he had known what G. F. J. A. Auwers was doing [see GA's 1863-2-20]; has found some more errors in nebula calculations.
Giving results (including diagram) of a comparison of earth currents and magnetometer disturbances.
Warren de La Rue has suggested that WB apply for a government grant to further his researches on the lunar surface. Would be grateful for his support.
Is satisfied with WB's work on meteorology. Comments on WB's intention to diagram the moon.
Regarding the gravimetric balance.
Sending him a correction for his article on meteorology relating to the rainfall of Bristol. Intends publishing a book on climate and will send him a copy.