The basis for the developments in the making of clarinets about the middle of the 19th century was the acoustical improvement made by the German flutist Theobald Boehm. In 1832 he made a flute whose tone holes are bored following rational acoustical principles. The aim was to improve the intonation, the eveness, and the volume of the sound. Boehm also simplified the technical requirements by using a system based on rings and keys. This mechanism was adopted for the clarinet by the clarinettist Hyacinthe Klosé (1808-1880) and the instrument maker Louis-Auguste Buffet. They called their instrument “clarinet à anneaux mobiles”. In 1843 they exhibited this model, which required a major change in fingering. The two major items of the Boehm clarinet were to abolish forked fingering, as well as to reduce the frequency of difficult tasks for the little fingers by offering several alternative keys.