Abstract
ALTHOUGH Mr. Scarff's observations with a helium discharge tube do not provide any quantitative basis of comparison, they are at least in qualitative agreement with our results1, inasmuch as “very fine leaks” apparently showed a rose-pink discharge characteristic of water-vapour, while larger leaks allowed air to enter the tube. On the basis of our results it is easy to show that air, as distinct from water-vapour, will begin to leak into an evacuated tube when the width of the channel through which the leak occurs is greater than about 2 X 10-4 cm., that is, when the pressure due to the surface tension of the water falls to about one atmosphere.
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Reekie, J., and Aird, J., Nature, 156, 367 (1945).
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REEKIE, J. Flow Through Very Small Channels. Nature 157, 24 (1946). https://doi.org/10.1038/157024c0
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DOI: https://doi.org/10.1038/157024c0
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