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Showing 21–40 of 79 items
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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.
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.