Geometric Model, M. Schilling No. 178. Ser. 3, No. 2, Ellipsoid
date: label: date made
content: 1900-1914
name: label: maker
content: Schilling, Martin
notes: label: Description
content: In the nineteenth and early twentieth century, students studying technical subjects often learned about the representation of surfaces by equations in courses in solid analytic geometry. Schools in Europe, the United States, and Japan sometimes purchased models to illustrate such surfaces. These objects are part of series of models of quadric surfaces (surfaces of degree two) designed in 1878 by Rudolf Diesel, then a student at the technical high school in Munich. It was published by the firm of Ludwig Brill in Darmstadt and then by Brill’s successor, Martin Schilling of Leipzig.
label: Description
content: The plaster model shows an ellipsoid, a surface that can be represented by the equation x<sup>2</sup>/a<sup>2</sup> + y<sup>2</sup>/ b<sup>2</sup> + z<sup>2</sup>/c<sup>2</sup> = 1. Sections parallel to any of the axes are ellipses. A grid of perpendicular lines of curvature is shown on the model. A paper tag on it reads: Ellipsoid (/) Verlag v. Martin Schilling, Leipzig. A pencil mark on this tag reads: Lines of Curv [. . .].
label: Description
content: Compare 1985.0112.068. Object MA.304722.23.08 might be a stand for this model.
label: Description
content: References:
label: Description
content: Ludwig Brill, <I>Catalog mathematischer Modelle. . .</I>, Darmstadt: L. Brill, 1892, p. 7, 75-76, 91.
label: Description
content: Henry Burchard Fine and Henry Dallas Thompson, <I>Coordinate Geometry</I>, New York: Macmillan Company, 1931, pp. 237-239.
label: Description
content: Gerard Fischer, <I>Mathematical Models</I>, Braunschweig / Wiesbaden: Friedr. Vieweg & Sohn, 1986, vol. I, p. 60, vol. II, pp.25-28.
label: Description
content: M. Schilling, <I>Catalog</I>, 1911, p. 137.
label: Location
content: Currently not on view
place: label: place made
content: Germany: Saxony, Leipzig
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1990.0571.03
label: catalog number
content: 1990.0571.03
label: accession number
content: 1990.0571
objectType: label: Object Name
content: Geometric Model
physicalDescription: label: Physical Description
content: plaster (overall material)
label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: 5.5 cm x 10 cm x 8 cm; 2 5/32 in x 3 15/16 in x 3 5/32 in