The art of double-counting on the lathe : whereby a variety of patterns in the form of ellipses, triangles, squares, pentagons, hexagons, and octagons, 3, 4, 6, and 8-looped figures, besides others of a more complex character, may be produced by means of the common eccentric chuck, used in combination with the division-plate and the eccentric and elliptical cutters (1857)
Ash, James · London : L. Booth · leaf 79
Plate 12. Pattern 21. Pattern 22.
Turning (Lathe work) · Lathes
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
