Geometric Model, M. Schilling No. 22 or L. Brill No. 192. Ser. 16 No. 5, Hyperboloid of Two Sheets
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 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). The series was continued by Martin Schilling.
label: Description
content: The model has no tags. A mark carved in the top reads: MICHIGAN.
label: Description
content: Compare 1985.0112.149.
label: Description
content: References:
label: Description
content: L. Brill, <I>Catalog mathematischer Modelle. . .</I>, Darmstadt: L. Brill,1892, p. 37, 59.
label: Description
content: M. Schilling, <I>Catalog</I>, 1911, p. 35, 138.
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: 1990.0571.19
label: catalog number
content: 1990.0571.19
label: accession number
content: 1990.0571
objectType: label: Object Name
content: Geometric Model
physicalDescription: label: Physical Description
content: plaster (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 21.2 cm x 29.2 cm x 13.3 cm; 8 11/32 in x 11 1/2 in x 5 1/4 in