National Geographic : 1951 Jul
© National Geographic Society " 36,000 Strands of Gut Represent the Lifework of 18,000 Worms Left: Orange gut as it comes from the silk farm and (second hank) the factory-bleached product. Yarn wrapped bundles have been sorted, stretched, polished, and trimmed. Pierced diamonds, shaving off excess thickness, form the finest diameters. Kodachromes by Luis Marden + Fishermen Use 70 Percent of Gut; Surgeons Take the Remainder These salmon flies are knotted to the heaviest gut, 21/1,000 inch; breaking point, about 17 pounds. Finer strands (not shown), some %-pound test, catch trout. Sutures are sealed in tubes of distilled water. Stitches must be removed; the system does not absorb them.