Comments on new star reported by WH [see WH's 1866-5-18]; includes diagram of that portion of the sky.
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Comments on new star reported by WH [see WH's 1866-5-18]; includes diagram of that portion of the sky.
Comments on WH's spectroscopic examination of cometary tails [see WH's 1868-7-2].
Has been occupied with the wedding of his daughter [Amelia], so unable to read his paper before. Comments on the various theories regarding the tail of the comet. Regrets his statements do not agree with those of WH.
Comments on WH's finding the carbon line in WH's spectroscopic examinations of cometary tails.
A note to accompany JH's biographical sketch of William Dawes.
Thanks to WH for the photograph of solar protruberances; comments on polarization of light from the sun.
Note with return of proof of JH's biographical sketch [see WH's 1869-1-22] of William Dawes.
Comments on some incorrect attributions to JH.
Comments on the radiant heat of heavenly bodies and the motion of Sirius.
About an increase in sun spot activity.
Note to accompany the reported observations of JH's son John.
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.
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.
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].
JH is preparing a digest of all double star observations; also comments on sunspot activity.