Farey's ellipsograph, 1817.

Made:: 1817 in London

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Brass Farey's ellipsograph dated 1817, in mahogany case

Farey's ellipsograph dated 1817 in mahogany case. An ellipsograph is used to draw ellipses, which consist of a combination of two circular motions. The drawing pencil is fixed in position in a central ring, which then revolves. At the same time, the ring is carried round in a circle, and the pencil traces the combination of these two paths.

Details

Category:: Mathematics

Object Number:: 1909-191

Materials:: brass, ivory and complete

Measurements:: overall (estimate): 55 x 230 x 180 mm

type:: ellipsograph

credit:: Theodore F.S. Tinne

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