1. Gutmann, F., and Netschey, A., J. Chem. Phys., 36, 2355 (1962); Nature, 191, 1390 (1961).
2. Kronick, P. L., and Labes, M. M., J. Chem. Phys., 38, 776 (1963).
3. Lagercantz, C., Psychopharmacology Service Center Bulletin (National Inst. of Health; Bethesda, Md.), 2, 53 (Dec. 1962). Forrest, I., and Piette, L. E., Biochim. Biophys. Acta, 57, 419 (1962).
4. Karremann, G., Isenberg, I., and Szent-Györgyi, A., Science, 130, 1191 (1959). Korloff, M., and Fitts, D. D., Biochim. Biophys. Acta, 47, 596 (1961).
5. Forster, E. O., and Gutmann, F., Conference on Surface Effects and their Detection, Washington, D.C. (June 1964) (Spartan Books, Inc.).