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Robert Holford Macdowall Bosanquet
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Robert Holford Macdowall Bosanquet : ウィキペディア英語版
Robert Holford Macdowall Bosanquet
Robert Holford Macdowall Bosanquet (31 July 1841 – 7 August 1912) was an English scientist and music theorist, and brother of Admiral Sir Day Bosanquet, and philosopher Bernard Bosanquet.Bosanquet was the son of Rev. R. W. Bosanquet of Rock Hall, Alnwick, Northumberland. He was educated at Eton College, and took first class honors in Natural Science and Mathematics at Balliol College, Oxford, and later became a fellow of St. John's College. He was called to the Bar at Lincoln's Inn, London but worked mainly tutoring at Oxford, notably for the Natural Science School, and later was Professor of Acoustics at the Royal College of Music. He was a musician and an authority on organ construction, and published a number of experimental and theoretical papers on acoustics, electromagnetism and astronomy. He was elected Fellow of the Royal Astronomical Society in 1871 and Fellow of the Royal Society in 1890.〔(【引用サイトリンク】 title= Libray and Archive Catalogue )
Bosanquet developed classes for musical tunings used mapping pitches in a coordinate arrangement he called a ''generalized keyboard'', contrasting with Henry Ward Poole's and Colin Brown's keyboards which were based on symmetry of key relationships. The keyboard was demonstrated in two instruments loaned permanently to the South Kensington Museum in 1876: a 4-octave harmonium tuned in 53 equal temperament with 84 keys per octave built by T. A. Jennings in 1872-3, and a 3-octave generalized keyboard organ built in 1875 with 48 notes per octave tuned to Hermann von Helmholtz' approximate just intonation (schismatic temperament) or 36 notes per octave tuned in quarter-comma meantone selected by means of draw stops. In 1877, speculating on papers about Indian śrutis, he relaxed the arrangement to permit mapping 22 equal temperament. He also invented a sensitive polariscope working independent of direction.
In 1890 he retired to Tenerife, spending summers in England. He died at his home called "El Castillo" (The Castle), near Los Realejos town, Tenerife Island (Canary Islands, Spain) in 1912.
== References ==


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