Abstract
OBSERVATIONS of phosphorescence phenomena in high vacua of the nature described by Crookes and Maskelyne have been lately made on a variety of substances by Herr Stürtz of Bonn, in company with Herr Müller (Wied. Ann. No. 11). The following substances gave phosphorescence (those marked with an asterisk were made red hot before being brought into the tube; in the ordinary state they showed little or no phosphorescence):— Brucite,* magnesite,* phosphate of magnesia, pitch-blende, wolframite, cerusite, adularia, orthoclase,* kaolin,* axinite,* silicate of zinc,* zinc-spar,* double spar, apatite, franklinite, azure spar, fergusonite,* apophyllite,* dolomite, cœlestine,* red spinelle, cobalt-glance, stannite, baryta, chromate of iron, lazu-lite, lepidolite, zinnwaldite, ankerite, greenockite, pectolith, borax, cinnabar, leucite, sanidin, and Java meteoric stone of 1869. A few luminous points were observed in crystals of arsenical iron and antimonite. Pieces of a phosphorescent substance made red hot are luminous with a different colour from that of pieces of the same not made red hot. In cerusite the phosphorescence is lost through heating. The authors give a list of substances which do not phosphoresce.
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Physical Notes . Nature 21, 287–288 (1880). https://doi.org/10.1038/021287b0
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DOI: https://doi.org/10.1038/021287b0