Surgical suture father of medicine, Hippocrates, described suture techniques, as did the later Roman Aulus Cornelius Celsus. The 2nd-century Roman physician Galen described gut sutures. In the 10th century, the catgut suture along with the surgery needle were developed by Abulcasis. The catgut suture was similar to that of strings for violins, guitar, and tennis racquet and it involved harvesting sheep intestines. Joseph Lister endorsed the routine sterilization of all suture threads. He first attempted sterilization with the 1860s "carbolic catgut," and chromic catgut followed two decades later. Sterile catgut was finally achieved in 1906 with iodine treatment. The next great leap
Rackets (sport) covered racket court and is now the oldest surviving court in the world, as well as being the oldest indoor sports building in Scotland. It has been restored as a racket hall, but used as an exhibition area. Some private clubs also built courts. Along with real tennis and badminton, rackets was used as an inspiration for the game of lawn tennis, invented in 1873 by Walter Clopton Wingfield. A vacant rackets court built into the University of Chicago's Stagg Field served as the location of the first artificial nuclear chain reaction on December 2, 1942. The Stagg Field court