Adriaan_Fokker--Hendrik_Antoon_Lorentz

Adriaan Daniël Fokker (Dutch pronunciation: [ˈaːdrijaːn ˈdaːnijɛl ˈfɔkər]; 17 August 1887 – 24 September 1972) was a Dutch physicist. He worked in the fields of special relativity and statistical mechanics. He was the inventor of the Fokker organ, a 31-tone equal-tempered (31-TET) organ.