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A transient method of measuring the thermal conductivity of insulators has been modified to allow measurements to be made on rocks and building materials in the approximate thermal conductivity range 0.008 to 0.07 J/cm °C s, with an accuracy of 7% or better. A detailed description is given of the apparatus, experimental procedure and corrections to be applied to the results obtained.
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G. Gafner (1957) studied this question.
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