Comments on color as a sensation, and on GS's thoughts on 'lavender rays.'
Showing 41–60 of 226 items
Comments on color as a sensation, and on GS's thoughts on 'lavender rays.'
Advises GS against spending £800 to verify the available drawings of Saturn; instead JH suggests alternative methods.
Asks GS about ordering instruments from [George] Wilson.
Inquiring about the cost of instruments being shipped.
Acknowledges receipt of a paper by [William] Pole, which JH will review.
Needs more time for reviewing Pole's paper [see JH's 1856-10-12].
Is sending in JH's report on Pole's paper [see JH's 1856-11-9].
Thanks the council of the R.S.L. through GS for the gift of a portrait of Nicholas Copernicus.
Is willing to have his review sent on to the author, [C. P.] Smyth; asks GS to send the R.S.L.'s copy of Keith Johnson's Physical Atlas to JH.
Carefully describes how to pack actinometers being shipped to India.
Agrees to allow Lord Oxmantown [Laurence Parsons] to add JH's remarks to Lord Oxmantown's paper.
Describes problem with spectral lines in telescope while trying to understand William Huggins's results.
Correction to be made in JH's biographical sketch of William Whewell.
Forwards letter from G. A. Erman of Berlin requesting that B.A.A.S. fund [H. J. R.] Petersen's study of terrestrial magnetism.
Corrects date on publication by G. A. Erman.
Asks JH questions about a paper on the dispersion of light from beyond the visible violet end of spectrum.
Has been studying the spectral lines of 'invisible' rays.
Thanks GS for 'canary' glass. Pleased with GS's 'photological' research, extending the spectrum.
Asks about problems in GS's paper that JH is reviewing. Remarks on spectral lines paper presented by Antoine Becquerel to Academie des sciences.
Surprised by length of spectrum produced by the combustion of metals, using electricity.