Golden ratio

Mark Barr

James Mark McGinnis Barr (May 18, 1871 – December 15, 1950) was an electrical engineer, physicist, inventor, and polymath known for proposing the standard notation for the golden ratio. Born in America, but with English citizenship, Barr lived in both London and New York City at different times of his life. Though remembered primarily for his contributions to abstract mathematics, Barr put much of his efforts over the years into the design of machines, including calculating machines. He won a gold medal at the 1900 Paris Exposition Universelle for an extremely accurate engraving machine. (Wikipedia).

Mark Barr
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From playlist Aircraft

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From playlist Music and fun

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From playlist People of Science with Brian Cox

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From playlist People of Science with Brian Cox

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From playlist Bicentennial Voices

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From playlist Genius & Innovation | A+E Networks

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From playlist First World War 1914-18

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From playlist People of Science with Brian Cox

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From playlist Breakthrough of the Year

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From playlist Law Review News!

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From playlist Lecture Collection | Darwin's Legacy

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From playlist Gravity

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From playlist Podcast | Overheard at National Geographic

Related pages

Tractrix | Golden ratio | William Schooling | Martin Gardner | Alfred North Whitehead | Nikola Tesla | Pi | Pantograph | Algorithm | Generalizations of Fibonacci numbers