1. See, for example, S. R. de Groot and P. Mazur, Non-Equilibrium Thermodynamics (North-Holland Publishing Co., Amsterdam, 1962). A very thorough discussion of the phenomenological theory is given, including many questions (such as the effect of polarization of the medium) which we do not treat.
2. This is not quite correct. In the presence of an external magnetic field (which we do not exclude) “diamagnetic” currents (the same currents giving rise to Landau diamagnetism) will flow. These are in general very much smaller than the currents we discuss here, and will be ignored in what follows.
3. See for example, L. Landau and E. Lifshitz, Statistical Physics (Pergamon Press, London, 1958), §25.
4. See P. S. Zyryanov and V. P. Silin, Zh. Eksperim. i Teor. Fiz.
46, 537 (1964), Soviet Physics—JETP
19, 366 (1964).
5. See de Groot and Mazur, op. cit. pp. 35 ff.