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Replies to several queries about papers of JH. JH describes the accidental production of some interesting copper salt crystals.
Thanks GS for his paper on fluorescent spectra; JH is interested in having these rays used on quartz, hoping to find his 'thermic' rays acting.
Writes to acknowledge receipt of a testimonial on behalf of [George] Wilson.
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.
Thanks GS for 'canary' glass. Pleased with GS's 'photological' research, extending the spectrum.
Declines to serve on experimental committee for R.S.L.
Agrees to help in other ways than as committee member [see JH's 1855-2-25].
Comments on GS's ideas [see GS's 1856-6-27] about the nature of fluorescence. Asks for strong horseshoe magnets from R.S.L. to try to solve the problem of 'Mahomet's coffin.'
Thanks for the magnetic theory [see GS's 1856-7-9] and agrees it argues against JH's ideas about Mahomet's coffin. Describes some interesting magnetic experiments JH has seen.
Approves changes made by William Pole in his paper [see GS's 1859-4-21]; comments on appropriate presentation of JH's report on it.
On some changes to the report on paper by William Pole [see JH's 1859-4-24]. Describes some experiments carried out with colored 'prismatic' light.