Abstract
IN a letter to the editor of this journal (NATURE, Feb. 7, 1925, p. 191) an account was given of a method for excitation of spark spectra, by which a vapour jet of the substance under examination is exposed to bombardment by electrons from an incandescent wire. During the development of the apparatus certain modifications were introduced with the result that a very intense source of light has been obtained. Under ordinary conditions the current through the discharge chamber is of the order of 1 amp. and can be maintained during several hours. It has further-more been possible to work with this discharge apparatus in connexion with a vacuum spectrograph manufactured by Adam Hilger, Ltd., in such a way that no fluorite windows are introduced in the path of light.
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WERNER, S. On the Spark Spectrum of Lithium. Nature 116, 574 (1925). https://doi.org/10.1038/116574a0
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DOI: https://doi.org/10.1038/116574a0
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