Abstract
IN NATURE of January 5, p. 30, experiments were described showing that gelatine, celluloid and cellophane, like vitreous silica, will allow helium (but not air) to pass fairly freely through them at the ordinary temperature. I have since found that vitreous boron trioxide has the same property. Vitreous borax, like the common glasses, does not possess it.
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RAYLEIGH Passage of Helium through Compact Solids. Nature 135, 993 (1935). https://doi.org/10.1038/135993a0
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DOI: https://doi.org/10.1038/135993a0
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