Blackboard Drawing Instrument, Curve, Hyperbola and Ellipse
date: label: date made
content: ca 1900
notes: label: Description
content: This flat wooden blackboard curve has a handle held vertically by screws. A mark on the top edge reads: ELLIPSE. Three marks along that edge indicate endpoints of axes of the ellipse. A mark on the bottom edge reads: HYPERBOLA. A mark at the center of the bottom edge indicates the turning point of the hyperbola. A hole on the right side allows one to suspend the instrument.
label: Description
content: Compare 1982.0795.36, which has a similar handle and general construction.
label: Description
content: The instrument came to the Smithsonian from the Mathematics Department of the University of Michigan in 1964.
label: Description
content: Reference:
label: Description
content: Accession File.
label: Location
content: Currently not on view
topic: label: Subject
content: Mathematics
label: Subject
content: Drawing Instruments
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Curves
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of the Department of Mathematics, The University of Michigan
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1982.0795.37
label: accession number
content: 1982.0795
label: catalog number
content: 1982.0795.37
objectType: label: Object Name
content: Curve
physicalDescription: label: Physical Description
content: wood (overall material)
label: Measurements
content: overall: 2.5 cm x 43.3 cm x 25 cm; 31/32 in x 17 1/16 in x 9 27/32 in