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2. Binder, H., Kohling, A., Krupp, H., Richter, K., and Sanstede, G., J. Electrochem. Soc., 112, 355 (1965).
3. Cairns, E. J., see p, 161 of this issue of Nature.
4. Thacker, R., presented at the 126th Electrochemical Society Meeting, Oct. 1964, see Extended Abst. of the Battery Div., 9, 22 (1964).
5. Niedrach, L. W. (unpublished results).