Abstract
I HAVE investigated some of the phenomena mentioned by Mr. J. H. Coste1 and Dr. S. C. Blacktin2 under this heading. There appear to be two distinct actions concerned: (a) The Blacktin effect3, consisting of periodic concentric light and dark zones, produced by posing the drop of oil on the film, due possibly to the advancing surface of the oil carrying particles from the light zones and banking them up in the dark zones. (b) When the drop of oil is allowed to fall from a height of 2 or 3 cm., the above effect is swamped by a different phenomenon, which is due to a liberation of gas from the film, as Mr. Coste has shown.
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References
NATURE, 131, 691, May 13, 1933.
NATURE, 131, 873, June 17, 1933.
NATURE, 129, 401, March 12, 1932.
Partington, “Inorganic Chemistry”, p. 657.
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CARDING, D. Interaction between Soot Films and Oil. Nature 132, 317–318 (1933). https://doi.org/10.1038/132317c0
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DOI: https://doi.org/10.1038/132317c0
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