1. J. A. Mayer, T. Waluga and J. A. Janik, Phys. Lett. 41A, 102 (1972), and private communication.
2. J. E. Lydon and D. G. Robinson, Biochîm et Biophys. Acta 260, 298 (1972).
3. E. Guyon, P. Pieranski and F. Brochard, Comptes Rendus 273B, 486 (1971).
4. P. Pieranski, F. Brochard and E. Guyon, to be published. We are indebted to Dr. Guyon for preprints of this work.
5. L. Liebert and L. Strzelecki, Comptes Rendus 276C, 647, (1973), have described a similar effect that involves polymerization rather than quenching.