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When heat flows from a solid into liquid helium II, there exists at the interface a temperature discontinuity, the magnitude of which is proportional to the heat flow density. Measurements to determine the constant of proportionality were made for copper and liquid helium II using an alternating heat flow. A description of the measuring apparatus is presented, and the s, are shown in graphic form.
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Brow et al. (1958) studied this question.
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