Abstract
WHEN a very small quantity of such a liquid as castor oil is placed upon a clean surface of water dusted with talc, it spreads over the water surface, brushing the talc on one side, and forms an invisible circular spot, the size of which depends upon the amount of oil used. This adsorbed film has the same surface tension as the surrounding water surface, namely, 73 dynes per cm. Hence Devaux, Lang-muir, and others regard the film as being only one molecule thick.
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Deeley, R. Density of Adsorbed Films. Nature 110, 313 (1922). https://doi.org/10.1038/110313a0
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DOI: https://doi.org/10.1038/110313a0
