Geometric Model, L. Brill No. 192. Ser. 16, 1, No. 5, Hyperboloid of Two Sheets

Geometric Model, L. Brill No. 192. Ser. 16, 1, No. 5, Hyperboloid of Two Sheets

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Description
In 1888, Ludwig Brill of Darmstadt published a series of nine models for teaching about surfaces of the second degree that have the same foci (confocal surfaces). The plaster models were patterned after some designed by the Finnish mathematician Edvard Rudolf Neovius (1851-1917) of Helsinki. This, the fifth in the series, represents a hyperbola of two sheets. It has the same foci as the ellipsoid that first model in the series and the hyperbola of one sheets that is the fourth model (for it, see 1985.0112.148).
A paper tag on the model reads: 192. Another tag reads: Zweischaliges Hyperboloid. (/) Verl. v. L. Brill. 16. Ser. I. Nr. V.
This example of the model was exhibited at the Columbian Exposition, a world’s fair held in Chicago in 1893, where it was purchased by Wesleyan University.
Reference:
L. Brill, Catalog mathematischer Modelle..., Darmstadt: L. Brill,1892, p. 37, 59.
Location
Currently not on view
Object Name
Geometric Model
geometric model
date made
1892
maker
L. Brill
place made
Germany: Hesse, Darmstadt
Physical Description
plaster (overall material)
metal (overall material)
Measurements
overall: 21.5 cm x 19.3 cm x 14 cm; 8 15/32 in x 7 19/32 in x 5 1/2 in
ID Number
1985.0112.149
catalog number
1985.0112.149
accession number
1985.0112
Credit Line
Gift of Wesleyan University
subject
Mathematics
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
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