Asks JH questions about a paper on the dispersion of light from beyond the visible violet end of spectrum.
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Asks JH questions about a paper on the dispersion of light from beyond the visible violet end of spectrum.
No summary available.
Has been studying the spectral lines of 'invisible' rays.
Asks about problems in GS's paper that JH is reviewing. Remarks on spectral lines paper presented by Antoine Becquerel to Academie des sciences.
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Surprised by length of spectrum produced by the combustion of metals, using electricity.
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Just received JH's report on GS's paper on refrangibility of light. Elaborates on lavender and brown rays.
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