Abstract
SOME properties of liquid helium I undergo an anomalous change as the lambda-point is approached. The entropy begins to drop rapidly with falling temperature between 2.6 and 2.19° K.1, and a similar drop in the same temperature region has recently been found in the viscosity2. The question therefore arose whether in the same temperature interval the heat conductivity will begin to rise to the anomalously high value found below the lambda-point. Such measurements have now been carried out and the result would seem to merit a preliminary communication. The experiments have been carried out on a vertical cylinder of liquid at the top of which heat was supplied. The heat was conducted downwards to a heat sink which could be maintained at a constant temperature. Two resistance thermometers of leaded brass were arranged at different heights within the cylinder and parallel to its base. The liquid was enclosed by a glass container in the form of a Dewar vessel.
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Keesom, W. H., and Keesom, A. P., Physica, 2, 557 (1935).
Bowers, R., and Mendelssohn, K., Proc. Phys. Soc., A, 62, 394 (1949); Proc. Roy. Soc., A (in the press).
Keesom, W. H., and Keesom, A. P., Physica, 3, 339 (1936).
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BOWERS, R., MENDELSSOHN, K. Heat Conductivity of Liquid Helium I. Nature 167, 111 (1951). https://doi.org/10.1038/167111b0
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DOI: https://doi.org/10.1038/167111b0
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