About an increase in sun spot activity.
About an increase in sun spot activity.
Has written to Lieut. John Herschel suggesting points on which solar observations might be valuable. Is pleased he has seen the bright lines. Saw some bright lines in the middle of the sun's disk.
Note to accompany the reported observations of JH's son John.
Would like his advice on how to publicize Lieut. John Herschel's letter; shall he send it to G. G. Stokes? Comments on the method for viewing the forms of prominences.
Thinks it would be best to send his son's letter to G. G. Stokes at the R.S.L. Cannot give a positive opinion on WH's plan for seeing the prominences. Finds some discrepancies in the Report of WH's paper on Sirius and the paper itself.
Has sent Lieut. John Herschel's letter to G. G. Stokes. Gives reasons for the discrepancies in the report of his paper and the paper itself. Is wondering whether to set up his large telescope further from London.
Suggests the planet Mercury may be a good subject for his spectroscopic experiments. Gives comments and explanations on his proposals. May like to communicate the results to the R.A.S.
Note to correct calculations in an earlier letter [see JH's 1869-9-20].
Burn his [last] letter as he made a blunder in his geometry. Cannot imagine how he made the blunder. Gives new formulae for observing Mercury.
Unable to make any observations at the moment as his observatory is being enlarged to receive his new large telescope. Thinks it would be a good idea to carry out observations on Mercury. Is not sorry to be able to rest his eyes from his trying spectrum experiments.
Is much obliged for the more correct determination of Mercury. As soon as he gets his new apparatus he will try to obtain observations of the planet.
The Council of the R.A.S. would like JH's opinion on the accompanying paper and drawing by Francis Abbott, and whether it should appear in the R.A.S.M.N.
Giving his opinion on a paper and drawing of [Francis] Abbott.
Further report on a paper and drawing of [Francis] Abbot [very similar to WH's 1870-5-18].
Requests that WH sign the certificate for the election of JH's son John as a Fellow of the R.S.L.
Apologizes for forgetting that since WH is on the Council of the R.S.L. he is precluded from signing [see JH's 1870-8-18].
Has had a letter from Cleveland Abbe inquiring when JH's Catalogue of Double Stars can be expected. Howard and Thomas Grubb have just erected his telescope but the eye end is not finished. Instrument will be very 'handy.'
JH is preparing a digest of all double star observations; also comments on sunspot activity.
Has sent JH's letter to Cleveland Abbe with a request to send JH the information. Has not seen the sun through his new telescope yet.
Thanks WH for informing JH of his son John being selected as a Council nominee for election to F.R.S.