Returns polar maps. Advises on methods of map projection, favoring polar projection. Working on new maps.
Returns polar maps. Advises on methods of map projection, favoring polar projection. Working on new maps.
Discusses his itinerary for the British Isles. Gives address where he may be reached. Wishes to visit JH at Collingwood. Congratulates JH on his improved health.
Discusses an edition of Antoine Lavoisier's works [3 vols., 1862-65] edited by JD. Comments on the edition and on the arrangements for JH receiving it.
All is well. Hope JH hears 'good accounts from India.'
Sends a copy of his Astronomical Investigations. Claims there is an 'inequality in the motions of Mars and the Earth.'
Sends information concerning India in response to letter of JH's son. [Sir Charles Edward] Trevelyan has printed such information occasionally. Many do not see the importance of India.
J. C. Symons is spreading locally false theories about the rotation of the moon. Would like JH's views on this.
Regrets that he thinks the faith of the public in astronomy should be shaken by the errors of J. C. Symons. Gives the theory of the rotation of the moon.
Thanks JF for his dissertation on the Progress of Mathematical and Physical Science. Discusses health of JF and JH. Suggests that some actinometric measurements are not as seriously flawed as at first thought [see JH's 1847-3-1].
Thanks for the magic square, which he is now returning. Seems no end to the possibilities of such squares.
Interprets [John] Dalton's theory of the nonelasticity of gas particles, expressing its limitations, particularly in regard to a Mr. Paton's paper.
About the state of GP's health, and plans for a vacation
Forwarding a copy of a letter written by GD's father in which he quotes from JH's writings. Is grateful for the tribute he paid to his father at the B.A.A.S. meeting.
Asks JH to recommend C. P. Smyth for R.S.L. fellowship. Will avoid R.S.L. meetings due to declining health. Considers a second edition of Cycle of Celestial Objects.
Agrees to support C. P. Smyth for membership in R.S.L. Objects to C. P. Smyth's statement regarding his discoveries observing at high altitudes. Stresses importance of variable star work.
Offers AD a puzzle and JH's solution to AD's problem about a body revolving in the evolute of an ellipse. On sending Francis Baily's correspondence to Greenwich.
Thanks JH for discovering an important error in a work WS asked him to proof read. Asks JH about a variable in Canis Minor over which there is some debate.
Thanks for having sent various publications; believes that the Academy's intention has been to send JH complete series; states which issues JH has not received.
Writes to arrange a visit to Collingwood.
Has been absent from home, which accounts for his belated reply. Comments on JH's difficulties in relation to W. H. Hopkins's memoir on the external temperature of the earth. JH's son is progressing well.