“…Nlany models have been proposed [5,10,13,14,21,23,26,40,41,43,44,47 to account for the properties of the wool fiber and frequently these models have heen based on histological or subcellular structures known to be present in the fibers. C.'hieHy, their purpose has been to provide an explanation for the presence of Hookean, yield, and postyield regions in the load-extension curves for wet fibers [43] ] and for the decrease in intensity of the a-type x-ray diffraction pattern and appearance of ã 3-pattern as the fibers are stretched [ 5 ] .…”