Letter to the Editor

Caldwell, B.J. , and Milligan, B. , The Estimation of Crosslinks in Wool from the Extent of Formic Acid Swelling, J. Textile Inst. 61, 588-596 (1970).

Leeder, J.D. , The Cell Membrane Complex and its Influence on the Properties of Wool, Wool Sci. Rev. (63), 1-35 (1986).

Leeder, J.D. , and Rippon, J.A. , Histological Differentiation of Wool Fibres in Formic Acid, J. Textile Inst. 73, 149-151 (1982).

Leeder, J.D. , Rippon, J.A. , Rothery, F.E. , and Stapleton , I.W. , Use of the Transmission Electron Microscope to Study Dyeing and Diffusion Processes, in "Proc. 7th Int. Wool Text. Res. Conf , Tokyo ," vol. 5, 99-148 (1985). 5. Rippon, J.A. , The Structure of Wool, ch. 1 in "Wool Dyeing," D. M. Lewis, Ed., Society of Dyers and Colorists , Bradford, U.K., 1992, pp. 1-51.

Sotton, M. , Hagege, R. , and Jacquemart, J. , Resultats Relatifs a L'Etude des Structures Poreuses des Fibres Textiles en Microscopies Optique et Electronique, Bull. Inst. Text. Fr. 24, 763-779 (1970).

Swift, J.A. , Pathways for Aqueous Diffusion in Keratin Fibers, Textile Res. J. 69 (2), 152 (1999).

Zahn, H. , Wool Is Not Keratin Only. plenary Lecture, in " Proc. 6th Int. Wool Text. Res. Conf, Pretoria," 1980, pp. 1-45.