Geometric Model by A. Harry Wheeler, Measurment of a Spherical Angle

Geometric Model by A. Harry Wheeler, Measurment of a Spherical Angle

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This cut paper tan model consists of two pieces showing circular discs with a projecting tangent plane at the top, as well as a paper ring of the same diameter. The ring fits in the intersecting discs to show how one measures a spherical angle. Two stickers read: MSA*. Another mark reads: Pat 1,192,483.
Compare MA.304723.156, MA.304723.671, and MA.304723.663. For pattern, see 1979.3002.087.
Currently not on view
Object Name
Geometric Model
Wheeler, Albert Harry
place made
United States: Massachusetts, Worcester
Physical Description
paper (overall material)
tan (overall color)
cut and folded (overall production method/technique)
average spatial: 7.8 cm x 7.8 cm x 7.8 cm; 3 1/16 in x 3 1/16 in x 3 1/16 in
ID Number
accession number
catalog number
Credit Line
Gift of Helen M. Wheeler
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Spherical Trigonometry
Data Source
National Museum of American History
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