A transient method for measuring with the same apparatus the thermal conductivity and diffusivity of a cylindrical rock specimen is described. The method involves heating the specimen by a wire placed in a shallow longitudinal saw cut. It may conveniently be used for measuring the variation of thermal properties with temperature. A complete theory of the method, including the effects of loss of heat at the surface of the cylinder, is given. An example shows good agreement over the temperature range 20 to 200°C between measured values for a dolerite and values calculated from its mineralogical composition.
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Jaeger et al. (1964) studied this question.
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