Geometric Model, M. Schilling No. 12 or L. Brill No. 191. Ser. 16 No. 4, Hyperboloid of One Sheet

Geometric Model, M. Schilling No. 12 or L. Brill No. 191. Ser. 16 No. 4, Hyperboloid of One Sheet

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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 fourth in the series, represents a hyperbola of one sheet. It has the same foci as the ellipsoid that first model in the series and the hyperbola of two sheets that is the fifth model (for it, see 1985.0112.149).
A mark on the top of the model reads: Sarmusbsi (/) "45".
Compare 1985.0112.148.
Reference:
L. Brill, Catalog mathematischer Modelle..., Darmstadt: L. Brill,1892, p. 35, 58.
Location
Currently not on view
Object Name
Geometric Model
date made
1888-1914
place made
Germany
Physical Description
plaster (overall material)
Measurements
overall: 21 cm x 24 cm x 11 cm; 8 9/32 in x 9 7/16 in x 4 11/32 in
ID Number
1990.0571.18
catalog number
1990.0571.18
accession number
1990.0571
subject
Mathematics
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
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