The study of silk - its review and prospects structural basis of silk fibre. Part 1 Biological aspects of silk yarn: wild silkworms in Japan pjysiology and heredity of silkgland of the domestic silkworm variations in the silk proteins in the silkworm reflection properties of light in the silkworm cocoon ultrastructure of silkgland of silkworm biosynthesis of silk fibroin molecular weight and sub-unit structure of fibroin molecular genetics of silk protein synthesis. Part 2 Physical aspects of silk yarn: mechanical properties of silk thread scanning electron microscopic observation of fine structure of fibroin fibres fine structure of silk fibres and lousiness fibres fine texture and physical properties of silk fibres structural formation of silk fibroin molecular motion in silk fibres structure of fibroin the crystal structure of silks conformation of silk protein in solution mechanism of silk spinning.