Abstract
IN the review of Ostwald's “Licht und Farbe in Kolloiden” which appeared in NATURE of November 8, p. 672, the reviewer alludes to the investigations of Keen and Porter on “sulphur suspensions containing particles large compared with wave-lengths and indigo in transmitted light.” He adds, “No theory of this phenomenon is available so far; until one is found there will be a distinct gap in the optics of disperse systems.”
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PARIS, E. The Colour of Sulphur Suspensions. Nature 114, 827 (1924). https://doi.org/10.1038/114827b0
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DOI: https://doi.org/10.1038/114827b0
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