Abstract
IN recent years there have been a number of attempts to improve the photographic methods, perfected by Schumann, used in the investigation of the ultra-violet, so far without any very striking results.
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LYMAN, T. Photographic Plates for the Extreme Ultra-Violet. Nature 112, 202 (1923). https://doi.org/10.1038/112202a0
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DOI: https://doi.org/10.1038/112202a0
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