31. Paul Kurtz wrote that other mediums had used a loop of catgut to obtain a similar effect with the accordion. 32. Polyesters were developed in the 1950s, and later the process of radiation sterilization was established for catgut and polyester. 33. Wildling bone armor is made from molds of actual bones, and is assembled with string and latex resembling catgut . 34. Catgut 's first racecourse appearance came on 12 April 1819 on the opening day of the Newmarket Craven meeting.35. Early in Apt's career, eye surgeons commonly used sutures that were made of catgut or collagen materials. 36. Basically, it's a flotation device built originally of a wooden frame strung with catgut like a tennis racket. 37. After World War II, Segovia became among the first to endorse the use of nylon strings instead of catgut strings. 38. Eventually, Catgut is uplifted by the prospects of her new future, and joins the animal musicians playing the trumpet. 39. He decided that proceedings from the sale of the catgut business should be used for a foundation to fund the library. 40. "' Sewing "'is the craft of fastening or attaching objects using sinew, catgut , and veins.