ABSTRACT
One of the distinguishing features of dielectric relaxation is that phenomena of interest may occur over an extremely wide frequency range. This range, from below 10−4 Hz to 1012 Hz, cannot be covered by any single instrument, hence a variety of techniques have been developed in order to allow accurate measurement in sections of this range. The basic principles of these methods will be described here; for more detailed information, a number of texts are available (e.g. Grant et al., 1978; Blythe, 1979).
