Geometric Model, L. Brill No. 11. Ser. 4 No. 1, Hyperboloid of One Sheet and Double Cone
date: label: date made
content: 1892
name: label: maker
content: L. Brill
notes: label: Description
content: This string model with a metal frame shows two ruled surfaces, that is to say surfaces swept out by moving straight lines. On the outside, shown in gold threads, is a doubly ruled hyperboloid of one sheet with an elliptic base and top. On the inside is a doubly ruled elliptic double cone, erected on the same base and top and shown in red.
label: Description
content: The model was published by the firm of Ludwig Brill in Darmstadt. This example was exhibited at the German Educational Exhibit at the Columbian Exposition held in Chicago in 1893, where it was purchased by Wesleyan University.
label: Description
content: References:
label: Description
content: Ludwig Brill, <I>Catalog mathematischer Modelle. . .</I>, Darmstadt: L. Brill, 1892, p. 9, 58.
label: Description
content: Henry Burchard Fine and Henry Dallas Thompson, <I>Coordinate Geometry</I>, New York: Macmillan Company, 1931, pp. 251-253. An example of this model is shown in Figure 6.
label: Location
content: Currently not on view
place: label: place made
content: Germany: Hesse, Darmstadt
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 Wesleyan University
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1985.0112.008
label: catalog number
content: 1985.0112.008
label: accession number
content: 1985.0112
objectType: label: Object Name
content: geometric model
physicalDescription: label: Physical Description
content: metal (frame material)
label: Physical Description
content: thread (surface material)
label: Measurements
content: overall: 25.5 cm x 23 cm x 14.5 cm; 10 1/16 in x 9 1/16 in x 5 11/16 in