Geometric Model, Hyperbolic Paraboloid

Geometric Model, Hyperbolic Paraboloid

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In the late nineteenth century, a few Americans began to make geometric models like those previously imported from Europe. This string model, made by the firm of Eberbach in Ann Arbor, Michigan, is very similar to one made in Germany at about the same time. The model is adjustable. When the metal triangles lie flat, the surface formed by the strings is a rhombus. If the tips of the triangles are raised, the threads form a surface called a hyperbolic paraboloid. The model came to the Smithsonian from the Department of Mathematics at the University of Michigan.
For another sting model by Eberbach, see 1982.0795.28.
Currently not on view
Object Name
geometric model
date made
ca 1900
Place Made
United States: Michigan, Ann Arbor
Physical Description
metal (frame material)
string (surface material)
overall: 35.8 cm x 30.7 cm x 21.8 cm; 14 1/8 in x 12 1/16 in x 8 9/16 in
ID Number
accession number
catalog number
Credit Line
Gift of the Department of Mathematics, The University of Michigan
Worlds Fair
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
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