Writes to clarify his understanding of the word 'fluorescence.' Asks JH to review a paper on color-blindness.
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Writes to clarify his understanding of the word 'fluorescence.' Asks JH to review a paper on color-blindness.
Further thoughts [see GS's 1856-6-27] on the nature of fluorescence, including that it is a transient phosphorescence.
Continues comments on fluorescence from letter of 1856-7-8; then shows mathematically that JH's solution for the problem of Mahomet's coffin [see GS's 1856-7-1] will not work.
Comments on one of the magnetism experiments JH described in his letter of 1856-7-14.
Sends [William?] Pole's paper on color blindness, in case JH wishes to examine it.
No summary available.
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.
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.