Cylinder, Ross Solid #8


This is the eighth in 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 is in the shape of a cylinder. Inscribed on the top of the cylinder is a square, with its diagonals indicated. An incomplete paper tag reads: C [. . .] R 3x6 [. . .] (/) When the [. . .] of the prism become infinite, it becomes a cylinder, the perimeter of a prism with an infinite number of sides being termed the circumference.

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 inscribed in it. This model suggests how a square pyramid might be inscribed in a cylinder.

Compare 1985.0112.208 and 1985.0112.210. For further information about Ross models, including references, see 1985.0112.190.

Date Made: ca 1895

Maker: Ross, W. W.

Location: Currently not on view

Place Made: United States: Ohio, Fremont

Subject: Mathematics


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


Exhibition Location:

Credit Line: Gift of Wesleyan University

Data Source: National Museum of American History

Id Number: 1985.0112.209Catalog Number: 1985.0112.209Accession Number: 1985.0112

Object Name: geometric model

Physical Description: wood (overall material)Measurements: overall: 15 cm x 7.3 cm x 7.3 cm; 5 29/32 in x 2 7/8 in x 2 7/8 in


Record Id: nmah_694086

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