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The Principle of Essential Identity
The Fluorescence of Kunzites and Calcites 1834
The CathodoLuminescence of Solid Solutions of FortyTwo
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absorption active agent appears bands were identified Bead clear Bead clouding Bead melts black body blue glow bombardment CaF2 calcite calcium fluoride calcium oxide cathode rays cathodo-luminescence cence Chapter chloride color components copper crests crystal curve decay described disk dysprosium effect emission europium exposure to X-rays flame excitation fluor fluorescence fluorite Fluorspar frequency interval fused green heated hydrogen flame incandescence indicated intensity kunzite light line-like lines luminescence manganese maximum brightness measurements metal method minutes molecules neodymium nescence Nichols observed obtained phosphate phosphorescence phosphoroscope photographs Phys plate powder present quartz radiation rare earths region Ruddy samarium sample Set I Set showed sodium solid solution solvent specimen spectra spectrophotometric spectrum substance sulphate surface Tanaka temperature terbium thallium thermo-luminescence tion traces tube ultra-violet uranium uranyl acetate uranyl chloride uranyl salts Urbain violet visible wave-length willemite yellow ytterbium yttrium zinc sulphide