Irregular or French Curve


This flat wooden drawing instrument has curves on the outside and in an inner opening.

The previous owner of the device collected more than twelve hundred hand and machine tools, displaying them at his family's building company in Baltimore, Md. This object came in a tool chest along with several others. Compare 1977.1101.0096.

This curve resembles one shown in Wallis. Hence the very rough date assigned.


Roland S. Wallis, Industrial Education Notes on Mechanical Drawing, Ames, Iowa: Engineering Extension Department Iowa State College, 1922, p. 15.

Accession File.

Date Made: ca 1920

Location: Currently not on view

Subject: MathematicsDrawing Instruments


See more items in: Medicine and Science: Mathematics, Curves, Science & Mathematics


Exhibition Location:

Credit Line: The John R. Gerwig, Jr., Collection

Data Source: National Museum of American History

Id Number: 1977.1101.0095Accession Number: 1977.1101Catalog Number: 1977.1101.0095

Object Name: Curve

Physical Description: wood (overall material)Measurements: overall: .3 cm x 20.9 cm x 7.3 cm; 1/8 in x 8 7/32 in x 2 7/8 in


Record Id: nmah_904422

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