Curve for Drawing a Hyperbola, Keuffel & Esser 2182

This small, flat unpainted wooden pear wood curve has a hyperbolic top edge and a straight bottom. There are two holes along the axis. A mark on one side reads: 2182. Another mark on the same side reads; KEUFFEL & ESSER (/) N.Y.
Keuffel & Esser’s model 2182 was a set of pear wood curves of hyperbolas in eight sizes, ranging from 2 to 5 1/2 inches in depth. This is the 3 ½ inch size. Keuffel and Esser sold ellipses, hyperbolas and parabolas made from pear wood from at least 1892 until at least 1913. By 1921, such curves were available from K & E only in xylonite.
Keuffel & Esser Company, Catalog, New York, 1892, p. 151.
Keuffel & Esser Company, Catalog, New York, 1909, p. 226.
Keuffel & Esser Company, Catalog, New York, 1913, p. 203.
Keuffel & Esser Company, Catalog, New York, 1921, p. 147.
Currently not on view
date made
ca 1900
Keuffel & Esser Co.
place made
United States: New York, New York
Physical Description
wood (overall material)
overall: .2 cm x 9.2 cm x 9.4 cm; 3/32 in x 3 5/8 in x 3 11/16 in
ID Number
catalog number
accession number
Credit Line
Gift of Wesleyan University
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History