Abstract
Spectroscopic excitation of Na, K, Cs, Mg, Cd, Zn, Hg, Tl vapors by atomic hydrogen.—Hydrogen from a Wood discharge tube flowed into a tube containing metal vapor and the spectrum emitted by the mixture was observed. Sodium and cadmium gave strong emission of their first resonance lines and no other lines. Potassium showed the first resonance doublet faintly. Mercury gave the complete hydride spectrum and faint emission of λ2537. Caesium, magnesium, thallium and zinc gave no line spectra.

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