Geometric Model by J. Schroeder, 19, Regular Tetrahedron


This wooden model of a regular tetrahedron has four equilateral triangles for sides.

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.

Date Made: ca 1889

Location: Currently not on view

Place Made: Germany: Hesse, Darmstadt

Subject: Mathematics


See more items in: Medicine and Science: Mathematics, Science & Mathematics


Exhibition Location:

Credit Line: Gift of the Department of Mathematics, The University of Michigan

Data Source: National Museum of American History

Id Number: 1982.0795.39Catalog Number: 1982.0795.39Accession Number: 1982.0795

Object Name: Geometric Model

Physical Description: wood (overall material)Measurements: overall: 6 cm x 7.7 cm x 7 cm; 2 3/8 in x 3 1/32 in x 2 3/4 in


Record Id: nmah_1213960

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