Accepts an invitation to dine with GA, and adds comments about problems JH is having with his vision.
Showing 41–60 of 236 items
Accepts an invitation to dine with GA, and adds comments about problems JH is having with his vision.
Comments on the ease of calculation in geodesy in JH's version of the English system of units, and asks GA for some clarifications as JH prepares the seventh edition of his Outlines Astr.
Asks for details about a strange drawing of Jupiter JH had seen at the Royal Observatory some months earlier, and offers some comments about Warren de La Rue's eclipse photographs.
Comments on the quality of the star catalogue of Charles Rümker [see John Wrottesley's 1866-4-16].
Comments on Jupiter's appearance and on the eclipse photographs [see JH's 1860-8-23].
Comments on Charles Rümker's observations and agrees to a meeting [see John Wrottesley's 1866-5-12].
Responds to meeting arrangements [see GA's 1866-5-24].
A note to accompany forwarding of papers and letters relating to Charles Rümker's observations [see GA's 1866-5-31].
Is very pleased with resolution about the observations of Charles Rümker [see Edward Sabine's 1867-8-30].
A note with a copy of JH's article on telescopes for the Encyclopaedia Britannica, together with some papers to be forwarded to James Glaisher.
Is assisting in communication between G. G. Stokes and GA, about stereoscopic observation of eclipses; JH is not mobile enough to attend the next Board of Visitors meeting.
A note with G. G. Stokes' letter, which JH forgot to enclose [see JH's 1867-5-5].
Has tried a number of different fractional projections, some more interesting than others [see GA's 1860-12-7].
Comments on the use of different telescopes and their effect on the albedo of the sun, related to solar eclipses [see JH's 1867-5-5].
Has sent an R.S.L. membership application certificate for GA to sign and send on.
Suggests reducing the number of Greenwich astronomical observations printed, but not reducing the magnetic and meteorological observations.
Not well enough to attend Visitation Day at the Royal Observatory; fears JH will not likely attend any future meetings and should perhaps withdraw from the Board of Visitors.
Is working on a problem in polarized light, and finds his result disagreeing with F. J. D. Arago's third law; leads JH to think light cannot be undulatory in nature.
Comments on GA's explanations about polarized light, and discusses GA's idea of the nature of light [see GA's 1865-10-18].
Realizes that GA is quite correct [see GA's 1865-10-30]; JH had neglected a basic principle about interference.