Geometric Model by J. Schroeder, 19, Regular Tetrahedron
date: label: date made
content: ca 1889
notes: label: Description
content: This wooden model of a regular tetrahedron has four equilateral triangles for sides.
label: Description
content: The model is part of a series of models sold by J. Schroeder of Darmstadt. The identity of the maker has been deduced from the similarity of the numbers stamped on models 1982.0795.39, 1982.0795.40, and 1982.0795.41 through 1982.0795.44 with the numbers of the Schroeder models of simple solids listed in the Johns Hopkins University Circular for January, 1885, p. 36. This list includes 41 wood models of simple solids and 10 wood models of quadric surfaces, and states that all were made by Schroeder. It also notes that Schroeder's agent in the U.S. was James W. Queen Company of Philadelphia. An 1884 catalog of Queen Company indicates that they sold three sets of Schroeder models of "simple solids", one with twelve pieces, one with forty pieces, and the third with 118 pieces. J. Schroeder was in business in Darmstadt from at least 1844 until at least 1893.
label: Location
content: Currently not on view
place: label: place made
content: Germany: Hesse, Darmstadt
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 the Department of Mathematics, The University of Michigan
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1982.0795.39
label: catalog number
content: 1982.0795.39
label: accession number
content: 1982.0795
objectType: label: Object Name
content: Geometric Model
physicalDescription: label: Physical Description
content: wood (overall material)
label: Measurements
content: overall: 6 cm x 7.7 cm x 7 cm; 2 3/8 in x 3 1/32 in x 2 3/4 in