Farey's ellipsograph, 1817.

Farey's ellipsograph, 1817.
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.
 
Currently on display in:
Mathematics
Year made :
1817
Inventory number :
1909-191