Model of Cubic Cones with a Cuspidal Edge by Richard P. Baker, Baker #81 (a Ruled Surface)
date: label: date made
content: ca 1900-1935
name: label: maker
content: Baker, Richard P.
notes: label: Description
content: This string model was constructed by Richard P. Baker, possibly before 1905 when he joined the mathematics faculty at the University of Iowa. Baker believed that models were essential for the teaching of many parts of mathematics and physics, and over one hundred of his models are in the museum collections.
label: Description
content: The typed part of a paper label on the top edge of the wooden frame of this model reads: No. 81 (/) CUBIC CONE: (/) CUSPIDAL EDGE.
label: Description
content: Baker’s string models represent a special type of geometric surface called a ruled surface. A ruled surface, sometimes called a scroll, is one that is swept out by a moving line. This model shows the ruled surface swept out by the yellow threads connecting the sides, base, and top of the model.
label: Description
content: A version of the model sold for $4.50, but it may have been considerably smaller.
label: Description
content: References:
label: Description
content: R. P. Baker, <I>A List of Mathematical Models</I>, [1905], p. 14.
label: Description
content: R. P. Baker, <I>Mathematical Models</I>, Iowa City, Iowa, 1931, p. 7.
label: Description
content: R. P. Baker Papers, University of Iowa, Iowa City, Iowa.
label: Location
content: Currently not on view
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Frances E. Baker
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.211257.007
label: accession number
content: 211257
label: catalog number
content: 211257.007
objectType: label: Object Name
content: geometric model
physicalDescription: label: Physical Description
content: thread (overall material)
label: Physical Description
content: wood (overall material)
label: Physical Description
content: metal (overall material)
label: Physical Description
content: black (overall color)
label: Physical Description
content: yellow (overall color)
label: Physical Description
content: screwed and threaded (overall production method/technique)
label: Measurements
content: average spatial: 41.8 cm x 53.7 cm x 42.3 cm; 16 15/32 in x 21 5/32 in x 16 21/32 in