1. B. Wunderlich and P. Sullivan, J. Polymer Sci. (to be published) (1961). Presented in part at the 140th meeting of the Am. Chem. Soc. 1961, Chicago.
2. P. W. Bridgman,The Physics of High Pressure(G. Bell and Sons, Ltd., London, 1949).
3. For a description see, for example, E. W. ComingsHigh Pressure Technology(McGraw-Hill Book Company, Inc., New York, 1956), pp. 87–89.