Great Icosahedron
notes: label: Description
content: This model of a great icosahedron is made of metal painted gray. A rod from one of the vertices extends down to a round wooden stand painted black. No maker's marks are on the model or the base. Most though not all of the small triangular sections that form the faces are marked in pencil: V. These sections join to form twenty identical intersecting faces.The twelve vertices are also identical. The surface was first described by the Frenchman Louis Poinsot in 1809 and is now known as a Kepler-Poinsot solid.
label: Description
content: Paper versions of this surface, made by students of A. Harry Wheeler, are also in the NMAH collections.
label: Description
content: Compare models MA.304723.26, MA.304722.27, and MA.304722.28.
label: Description
content: Reference:
label: Description
content: H. M. Cundy and A. P. Rollet, <I>Mathematical Models</I>, Oxford: The Clarendon Press, 1961.
label: Location
content: Currently not on view
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Brown University Department of Mathematics
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.304722.28
label: catalog number
content: 304722.28
label: accession number
content: 304722
objectType: label: Object Name
content: Geometric Model
label: Object Name
content: geometric model
physicalDescription: label: Physical Description
content: wood (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 27 cm x 13.5 cm x 13.5 cm; 10 5/8 in x 5 5/16 in x 5 5/16 in