Abstract
THE spectrum of a high-tension D.C. arc between spectrographically pure tungsten electrodes was photographed in the near infra-red, the visible and the ultra-violet regions using the Steinheil 3-prism-spectrograph with a camera focus of 1,600 mm. Though the spectrograms were largely covered with continuous background, a number of red degraded bands could be recognized and were measured on the Abbe comparator.
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GATTERER, A., KRISHNAMURTY, S. Two Band Systems of Tungsten Oxide. Nature 169, 543 (1952). https://doi.org/10.1038/169543a0
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DOI: https://doi.org/10.1038/169543a0
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