Third installment of Werner von Bergen's serial article on musk-ox wool as a possible commercial textile fiber. It covers the chemical properties of the raw hair (fat content, yield, dye affinity, sensitivity to chemicals) and compares it microscopically with yak, vicuna, cashmere and camel hair. Includes width-variation charts, 240x microphotographs, and a comparison table of color, length, fineness, scales, quality and medullation. The author concludes that musk-ox shoulder wool is closest to cashmere and may be the finest known wool hair.