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Conductivity of Oils and Waxes



A FEW years ago I detected a curious region of negative temperature coefficient of the conductivity of heavy oils, namely, a rising conductivity with decreasing temperature1. It occurred in the neighbourhood of the solidifying point. A similar phenomenon has recently been observed by W. Jackson with paraffin wax2, just below its melting point. The effect is thought to represent probably a characteristic of both oils and waxes, at least of those containing hydrocarbons. It seems therefore desirable to put forward a theory to account for it.

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  1. 1

    Z. Phys., 75, 613; 1932.

  2. 2

    NATURE, 133, 647; 1934.

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