The standardization of the saybolt unive
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Herschel, W.H. (author)
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Article
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1918
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Elsevier BV
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English
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THE BUREAU has published a description of the various methods which may be employed for determining ,the permeability of balloon fabrics to hydrogen. The precise and rapid method used at the Bureau of Standards measures the hydrogen penetrating a given area of fabric by means of a gas interferometer