1. Joule, J. P., and Thomson, W., Phil. Trans. Roy. Soc., 144, 321 (1854).
2. Adams, L. H., J. Geol., 32, 191 (1924); Barton, jun., P. B., and Toulmin, P., US Geol. Survey Prof. Paper 424D, D-350 (1961).
3. Pippard, A. B., The Elements of Classical Thermodynamics, (Cambridge University Press, 1957).
4. Kelley, K. K., US Bureau Mines Bull., 584 (1960); Skinner, B. J., Geol. Soc. Amer. Mem., 97, 75 (1966); Robie, R. A., and Waldbaum, D. R., US Geol. Survey Bull. 1259 (1968).
5. Ringwood, A. E., Boyd, F. R., and Macgregor, I. D., Carnegie Inst. Wash. Yearbook, 63, 147 (1964).