Geometric Model, L. Brill No. 233, Ser. 21 No. 3, Ruled Surface, Space Curve of Fourth Order
date: label: date made
content: 1892
name: label: maker
content: L. Brill
notes: label: Description
content: This is one of a set of seven models of surfaces representing space curves of fourth order designed by Karl Rohn, professor of mathematics at the technical high school in Dresden. The series was first published by Brill in 1892. The object has a black metal frame and white threads, which appear to be plastic. The frame has a circular base and top. There are two overlapping ruled surfaces, each with 48 strings. There also is the framework for a second surface that would fit within the first. A tag on the model indicates it is part of Brill's series 21.
label: Description
content: This example of the model was exhibited at the Columbian Exposition, a World’s Fair held in Chicago in 1893.
label: Description
content: Compare models 1985.0112.181, 1985.0112.182, 1985.0112.183, 1985.0112.184, and 1985.0112.186.
label: Description
content: References:
label: Description
content: L. Brill, Catalog mathematischer Modelle. . ., Darmstadt: L. Brill, 1892, pp. 40-42, 75.
label: Description
content: An example of this model is #38 in the Altgeld collection of mathematical models at the University of Illinois. An image of it has a tag with the series 21, number 3 designation. See http://www.mathmodels.illinois.edu/cgi-bin/cview?SITEID=4&ID=350.
label: Location
content: Currently not on view
place: label: place made
content: Germany: Hesse, Darmstadt
setName: label: See more items in
content: Medicine and Science: Mathematics
creditLine: label: Credit Line
content: Gift of Wesleyan University
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1985.0112.186
label: accession number
content: 1985.0112
label: catalog number
content: 1985.0112.186
objectType: label: Object Name
content: geometric model
label: Object Name
content: geometric model
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 20 cm x 20 cm x 20 cm; 7 7/8 in x 7 7/8 in x 7 7/8 in