Über den einheitlichen Ursprung der blauen Wasserfarbe

Spring, W. N. Jahrb. f. Mineral. (1899), 1899(I), 99-104; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010).

Author give, its investigations (see 99. I. 1011) continuing, some experiments, from which it concludes the fact that the pure water is actually blue, which cause suspended portion cups a shining of the same and depending upon their nature and to the emergence of a yellowish- or reddish- coloring contributes condition, which brings the latter due to its cooperation with the blue primer the different green shades of the natural water to the appearance or fading of each coloring.

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