Geometric Model, M. Schilling No. 12 or L. Brill No. 191. Ser. 16 No. 4, Hyperboloid of One Sheet
date: label: date made
content: 1888-1914
notes: label: Description
content: 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).
label: Description
content: A mark on the top of the model reads: Sarmusbsi (/) "45".
label: Description
content: Compare 1985.0112.148.
label: Description
content: Reference:
label: Description
content: L. Brill, <I>Catalog mathematischer Modelle. . .</I>, Darmstadt: L. Brill,1892, p. 35, 58.
label: Location
content: Currently not on view
place: label: place made
content: Germany
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1990.0571.18
label: catalog number
content: 1990.0571.18
label: accession number
content: 1990.0571
objectType: label: Object Name
content: Geometric Model
physicalDescription: label: Physical Description
content: plaster (overall material)
label: Measurements
content: overall: 21 cm x 24 cm x 11 cm; 8 9/32 in x 9 7/16 in x 4 11/32 in