Catgut suture treatment produces roughly twice the stitch-holding time of plain catgut, but greater tissue inflammation occurs. Full tensile strength is extended to 18–21 days. It is brown rather than straw-colored, and has improved smoothness due to the dry presentation of the thread (plain catgut is wet). It is otherwise similar to plain catgut. Fast catgut suture is heat-treated to give even more rapid absorption in the body. The first known absorbable sutures were made of the intestines of sheep. The manufacturing process was similar to that of natural musical strings for violins and guitar, and also of natural strings for tennis
Concerto for Piano, Violin and Strings (Mendelssohn) Concerto for Piano, Violin and Strings (Mendelssohn) The Concerto for Piano, Violin, and Strings in D minor, MWV O4, also known as the Double Concerto in D minor, was written in 1823 by Felix Mendelssohn when he was 14 years old. This piece is Mendelssohn's fourth work for a solo instrument with orchestral accompaniment, preceded by a Largo and Allegro in D minor for Piano and Strings MWV O1, the Piano Concerto in A Minor MWV O2, and the Violin Concerto in D minor MWV O3. Mendelssohn composed the work to be performed for a private concert on May 25,