Harmonograph

A harmonograph is a mechanical apparatus that employs pendulums to create a geometric image. The drawings created typically are Lissajous curves, or related drawings of greater complexity. The devices, which began to appear in the mid-19th century and peaked in popularity in the 1890s, cannot be conclusively attributed to a single person, although Hugh Blackburn, a professor of mathematics at the University of Glasgow, is commonly believed to be the official inventor.

单词	harmonograph
释义	harmonograph /ha:'mɔnəgra:f/ 英汉-汉英词典 n. 谐振记录器词组 \| 习惯用语您要查找的是不是： harmonica n. 口琴 phonograph n. 留声机 monograph n. 专著,专论 chronograph n. 记时计；记秒表 harmonograph n. 谐波记录器，谐振记录器英语百科 Harmonograph A harmonograph is a mechanical apparatus that employs pendulums to create a geometric image. The drawings created typically are Lissajous curves, or related drawings of greater complexity. The devices, which began to appear in the mid-19th century and peaked in popularity in the 1890s, cannot be conclusively attributed to a single person, although Hugh Blackburn, a professor of mathematics at the University of Glasgow, is commonly believed to be the official inventor.
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harmonograph /ha:'mɔnəgra:f/

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Harmonograph