Model of the Geometric Sum of Spherical Steps by Richard P. Baker, Baker #438

Model of the Geometric Sum of Spherical Steps by Richard P. Baker, Baker #438

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This geometric model was constructed by Richard P. Baker in the early twentieth century when he was Associate Professor of Mathematics at the University of Iowa. Baker believed that models were essential for the teaching of many parts of mathematics and physics, and over 100 of his models are in the museum collections.
This painted wire structure has a tag that reads: No. 438 (/) Geometric sum spherical (/) steps.
Baker built nine models to correspond to figures described by the German mathematician Eduard Study in his book on the geometry of dynamics (shortened by Baker to Dynamen). Examples with numbers MA.211257.089 (this one) and MA.211257.090 relate to finding the sum of spherical wedges.
Study, E., Geometrie Der Dynamen: Die Zusammensetzung Von Kräften Und Verwandte Gegenstände Der Geometrie Bearb., Leipzig: B.G. Teubner, 1903, esp. pp. 34-35.
Baker,R.P., Mathematical Models,, Iowa City, 1931, p. 16.
Currently not on view
Object Name
geometric model
date made
ca 1906-1935
Baker, Richard P.
Physical Description
metal (overall material)
beige (overall color)
soldered (overall production method/technique)
average spatial: 6.6 cm x 19.8 cm x 18.3 cm; 2 19/32 in x 7 25/32 in x 7 7/32 in
ID Number
accession number
catalog number
Credit Line
Gift of Frances E. Baker
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
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