1. Liebhafsky, H. A., has suggested the use of this term in connexion with fuel cells. Since then, a search of Chemical Abstracts showed that this term had been used on a few occasions by Russian investigators in connexion with the cathodic hydrogenation of organic compounds (Chem. Abst., 30, 8040; 1936. 34, 1256, 3186; 1940).
2. Liebhafsky, H. A., and Cairns, E. J., Proc. 1962 Pacific Energy Conversion Conf., San Francisco, California (Dec. 1962).
3. Grubb, W. T., Proc. Sixteenth Ann. Power Sources Conf., Atlantic City, N.J., 31 (May 1962).
4. McKee, D. W., J. Amer. Chem. Soc., 84, 4427 (1962).
5. McKee, D. W., J. Phys. Chem., 67, 841 (1963).