Geometric Model, L. Brill No. 12. Ser. 4, No. 2, Cylinder, Cone and Plane Transformable into One-Sheeted Hyperboloid and Hyperbolic Paraboloid

Description
From the early nineteenth century, mathematicians and engineers have studied surfaces generated by motion. The gold threads of this model form a cylinder, the red ones a double cone. Rotating the top circle of the frame twists the gold threads and untwists the red ones, forming surfaces called hyperboloids. The blue threads, which initially lie in a plane, become a hyperbolic paraboloid. This model was made in Germany and exhibited at the Columbian Exposition, the world's fair held in Chicago in 1893. It came to the Smithsonian from the mathematics department of Wesleyan University in Connecticut.
Location
Currently not on view
Object Name
geometric model
Date made
1893
maker
Brill, L.
Physical Description
metal (overall material)
string (overall material)
glass (overall material)
Measurements
overall: 63.5 cm x 35 cm x 16 cm; 25 in x 13 3/4 in x 6 5/16 in
Place Made
Deutschland: Hessen, Darmstadt
ID Number
1985.0112.009
accession number
1985.0112
catalog number
1985.0112.009
subject
Education
Worlds Fair
Science & Mathematics
Mathematics
See more items in
Medicine and Science: Mathematics
Data Source
National Museum of American History, Kenneth E. Behring Center
Title
Adjustable String Model
Credit Line
Gift of Wesleyan University

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