Figure skating jumps
Jumps are referred to by how many times the skater turns in the air. One revolution (one and a half for the Axel) is a "single" jump. Two revolutions (two and a half for the Axel) is a "double" jump. Three revolutions (three and a half for the Axel) is a "triple" jump. Four revolutions (four and a half for the Axel, although this has never been done in competition) is a "quadruple" or "quad" jump. The first triple jump landed in competition was a loop jump. It was landed by Dick Button in 1952. The first quadruple jump landed in competition was a toe loop jump. It was landed by Kurt Browning in 1988. Currently, men in world-class competition usually attempt a full set of triples and sometimes one or two quadruple jumps in their free skating programs. Triple Axels are rare for ladies, and quadruple jump attempts even more so.
Jean-Baptiste Singelée
As a longtime friend of Adolphe Sax, the inventor of the saxophone (they met as students at the Royal School of Music), he encouraged Sax to develop the four principal members of the saxophone family, and composed what is very likely the first work ever written for the saxophone quartet, his "Premier Quatuor", Op. 53, completed in 1857. In addition to his saxophone works, Singelée is credited with composing 12 concertos, many solo works for violin and other instruments as well as music for ballet.