Octagonal Prism, Ross Solid

This is one of a series of models illustrating the volume of solids designed by William Wallace Ross, a school superintendent and mathematics teacher in Fremont, Ohio.
The unpainted wooden model has eight rectangular sides and an octagonal top and bottom. Four straight lines join opposite vertices of the octagons on each end, suggesting how the solid might be divided into eight triangular prisms. A mark on a label on the side reads: OCTAGONAL PRISM. Further text discusses the surface area and volume of the solid.
In the series of plane figures, Ross compared the area of a circle to the area of circumscribing polygons of increasing numbers of sides. To demonstrate the volume of a cylinder, he compared it to various regular prisms, including the octagonal.
Compare models 1985.0112.205 through 2012.0112.217. For further information about Ross models, including references, see 1985.0112.191.
Currently not on view
Object Name
geometric model
date made
ca 1895
Ross, W. W.
Physical Description
wood (overall material)
overall: 15 cm x 5 cm x 5 cm; 5 29/32 in x 1 31/32 in x 1 31/32 in
place made
United States: Ohio, Fremont
ID Number
catalog number
accession number
Science & Mathematics
Arithmetic Teaching
See more items in
Medicine and Science: Mathematics
Arithmetic Teaching
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Wesleyan University
Additional Media

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