1. W. T. Astbury, Trans. Far. Soc., 29, 193; 1933: also pp. 146 and 217.
2. W. T. Astbury and H. J. Woods, “The Molecular Structure and Elastic Properties of Hair Keratin” (Roy. Soc., in press).
3. A. T. King, J. Text. Inst., 17, T53; 1926.
4. See, for example, S. G. Barker, “Wool Quality” (E.M.B., 1931).
5. D. Jordan Lloyd, Biol. Rev., 7, 254; 1932; “The Swelling of Proteins”, p. 74 (Conference of the International Society of Leather Trade's Chemists, 1932); D. Jordan Lloyd and H. Phillips, Trans. Far. Soc., 29, 132; 1933.