1. Kuhn, W., Hargitay, B., Katchalsky, A., and Eisenberg, H., Nature, 165, 514 (1950). Kuhn, W., Experientia, 5, 318 (1949). Katchalsky, A., ibid., 5, 319 (1949). Breitenbach, J. W., and Karlinger, H., Mh. Chem., 80, 311 (1949). Other systems of this kind are listed in the bibliography for ref. 2–6.
2. Kuhn, W., Ramel, A., Walters, D. H., Ebner, G., and Kuhn, H. J., Adv. in Polymer Sci., 1, 504 (1960). This review article and its bibliography covers each of the respective high-polymer muscles, and the general teinochemical principle, in sequential order of development.
3. Kuhn, W., et al., in the press (1960–61); addendum, Experiments in Progress: (a) birefringence and tension studies to determine their relationship to the time–potential curve and to the initial points of contraction and dilation ; (b) oscilloscopic (with attached camera) msec. study of slope and duration of lines BC and B′C′ of Figs. 1–3a, b; (c) continuation of present studies on gel blocks crosslinked by other techniques (for example, chemical and irradiation).
4. Donnan, F. G., Z. Elektrochem., 17, 572 (1911). Donnan, F. G., and Guggenheim, E. A., Z. physik. Chem., A, 162, 346 (1932). Overbeek, J. Th., J. Coll. Sci., 8, 593 (1953). Symp. Electrical Double Layer in Colloids, Nature, 183, 78 (1959).
5. Hodgkin, A. L., Biol. Rev., 26, 339 (1951). Hodgkin, A. L., and Huxley, A. F., J. Physiol., 116, 449 (1952a).; 116, 473 (1952b).