Geometric Model by L. Brill, No. 225, Ser. 18 No. 3, Ruled Surface of Third Degree
date: label: date made
content: 1892
name: label: maker
content: L. Brill
notes: label: Description
content: This is one of a set of four models of ruled surfaces originally published by Ludwig Brill in 1891. The series was designed by C. Tesch, an assistant to Christian Wiener (1826-1896), a professor at the technical high school in Karlsruhe. Tesch also designed Series 20 of Brill’s models (also published in 1891) and, after graduation, Series 22 (published in 1894, by which time Tesch is listed as an engineer with no academic affiliation).
label: Description
content: This, the third model in Brill's Series 18, has a black metal frame and should have red and green threads, with gold beads. The three sides are roughly straight, with complex curves on the top and bottom. One side is broken off. The threads in this example are presently missing.
label: Description
content: All the models in the series are meant to show ruled surfaces of degree three. As in #2, there should be two lines of intersection of the ruled surfaces, marked by beads, but these lines would meet only infinitely far from the model.
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 1985.0112.179.
label: Description
content: References:
label: Description
content: L. Brill, <I>Catalog</I>, 1892, p. 64-65, 44-45.
label: Description
content: Richter, K., Online Collection of Mathematical Models, Martin-Luther-Universität Halle-Wittenberg. This collection has the web address: https://www2.mathematik.uni-halle.de/modellsammlung/. The example of this model shown there has number A3-032 in that collection.
label: Description
content: Tesch. C., <I>Modelle der Regelfaechen dritten Gerades</I>. A copy of this essay, which gives a brief historical account of the development of the model at Karlsruhe, is online at http://modellsammlung.uni-goettingen.de/data/Texts/M1/Modelle72-75_Tesch.pdf. It was posted in connection with the copy of the model at the University of Goettingen (their model 74).
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: 1985.0112.185
label: catalog number
content: 1985.0112.185
label: accession number
content: 1985.0112
objectType: label: Object Name
content: geometric model
label: Object Name
content: geometric model
physicalDescription: label: Physical Description
content: string (overall material)
label: Physical Description
content: glass (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 21.6 cm x 20.5 cm x 20.5 cm; 8 1/2 in x 8 1/16 in x 8 1/16 in