Abstract
THE researches of Schumann led him to extend the spectrum to the neighbourhood of wave-length 1250. His limiting wave-length was determined by the absorption of the fluorite which formed a necessary part of his apparatus. In 1904 I succeeded in pushing the limit to wave-length 1030 by the use of a concave diffraction grating.
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LYMAN, T. An Extension of the Spectrum in the Extreme Ultra-Violet. Nature 93, 241 (1914). https://doi.org/10.1038/093241a0
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DOI: https://doi.org/10.1038/093241a0
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