Catgut suture used on a kit, or fiddle). Misinterpretation of the word kit as referring to a young cat led to the use of the term catgut. Surgical gut is in fact made from the submucosa of sheep intestine or the serosa of bovine intestine and is approximately 90% collagen. Perhaps another possible explanation of the name is the combination of the words cattle and gut. B Braun Medical AG, a German Multi National company first industrialized catgut suture and Catgut is a brand registered with B Braun. Catgut Chrome (B Braun) suture is a variant treated with chromic acid salts. This
Geophone (musical instrument) performance in New York City). Messiaen's wife, Yvonne Loriod, commented that when she and the composer first collected the new instrument from the maker in her car it made a "splendid crescendo" whenever they went round a corner. Messiaen also included the instrument in his only opera, "Saint François d'Assise", which was first performed in Paris 1983. Other works that use the geophone include "Asyla" by Thomas Adès, "…towards a Pure Land" by Jonathan Harvey, and the operas "The Sacrifice" by James MacMillan and "Dark Sisters" by Nico Muhly. Geophone (musical instrument) The geophone is a percussion instrument, invented by