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John Farey, Jr.
John Farey, Jr. (1791–1851) was an English mechanical engineering, consulting engineer and patent agent, known for his pioneering contributions in the field mechanical engineering.〔Alec Skempton. "(Farey, Jr., John )," in: ''A Biographical Dictionary of Civil Engineers in Great Britain and Ireland: 1500-1830.'' 2002. p. 223-224〕
As consulting engineer Farey has worked for many well-known inventors of the later Industrial Revolution, and was a witness to a number of parliamentary enquiries, inquests and court cases, and on occasion acted as an arbitrator. He was polymathic in his interests and contributed text and drawings to a number of periodicals and encyclopaedias.
Farey is also remembered as the first English inventor of the ellipsograph, an instrument used by draughtsmen to inscribe ellipses.
==Biography.==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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