Curve for Drawing an Ellipse, Keuffel & Esser Model 1825

Description
This flat black rubber ellipse has two holes along the major axis. The major axis is drawn in pencil. A mark on the curve reads: KEUFFEL & ESSER Co (/) NEW YORK (/) AND (/) CHICAGO.
According to the K&E Catalog, these models were sold in sets of ten, with major axes ranging in size from 1 1/2" to 6". This would be the 6" size.
Reference:
Keuffel & Esser Company, Catalog, 1906, p. 215. In the 1909 catalog, models of this number are listed as made from xylonite instead of hard rubber.
Location
Currently not on view
date made
ca 1906
maker
Keuffel & Esser Co.
place made
United States: New York, New York
Physical Description
rubber (overall material)
Measurements
overall: .1 cm x 15.3 cm x 11.5 cm; 1/32 in x 6 1/32 in x 4 17/32 in
ID Number
1985.0112.228
catalog number
1985.0112.228
accession number
1985.0112
Credit Line
Gift of Wesleyan University
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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