Keuffel & Esser Co. Hard Rubber Irregular Curve or French Curve

Description
This black hard rubber curve has one opening and numerous scallops on the edges. A mark near the bottom reads: KEUFFEL & ESSER (/) N.Y. This curve is similar to number 19 in catalog entry 1820 in the K & E Catalogue. However, it has an additional notch on the upper left side.
The curve came to the Smithsonian from the Department of Mathematics of Brown University.
Reference:
Keuffel & Esser Company, Catalogue, 1890, p. 140, 1909, p. 206-207. Hard rubber irregular curves are not listed in the 1921 or 1936 catalogs.
Location
Currently not on view
date made
ca
ca 1900
maker
Keuffel & Esser Co.
place made
United States: New Jersey, Hoboken
Associated Place
United States: New York, New York
Physical Description
rubber (overall material)
Measurements
overall: .1 cm x 20.4 cm x 9.5 cm; 1/32 in x 8 1/32 in x 3 3/4 in
ID Number
MA.304722.11
accession number
1973304722
catalog number
304722.11
Credit Line
Gift of Brown University Department of Mathematics
subject
Mathematics
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Curves
Data Source
National Museum of American History, Kenneth E. Behring Center

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