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English: John Clinton (1810–1864), professor of flute at the Royal Academy from 1842 to 1855, flutist for the Royal Italian Opera from 1847 to 1862, flute maker from about 1945 until his death, and exponent of the Boehm System — the prevailing fingering system for flute that won-out and endures today. He had been a student of Charles Nicholson (1795–1837) at the Royal Academy. At the age of 24 (1834) he was publishing his first compositions. Clinton adopted the Boehm system around 1841 and taught it to his pupils at the Royal Academy. Clinton wrote what was probably the first instruction book for the Boehm flute. Clinton made and sold his own flutes, commonly referred to as Clinton flutes, beginning around 1945. His flutes adopted the Boehm system, but but maintained a mechanical structure similar to an old eight-key system. Clinton flutes were produced by Rudall Carte, a firm composed of George Rudall (1781–1871) and Richard Carte (1808–1891), et al.