No summary available.
No summary available.
Thanks GS for a number of his papers on railway bridge fractures, gravitation, and the spectrum.
Asks JH questions about a paper on the dispersion of light from beyond the visible violet end of spectrum.
Replies to several queries about papers of JH. JH describes the accidental production of some interesting copper salt crystals.
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No summary available.
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.
No summary available.
No summary available.
Surprised by length of spectrum produced by the combustion of metals, using electricity.
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.
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No summary available.
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Writes to acknowledge receipt of a testimonial on behalf of [George] Wilson.