Ruled Surface with Chrome Frame, Hyperboloid of One Sheet
date: label: date made
content: ca 1934
notes: label: Description
content: This ruled surface, a model of a hyperboloid of one sheet, has a chrome frame with a circular base and top and three vertical supports. The supports are arranged so that the model is adjustable. The model has yellow threads, all of which twist in one direction.
label: Description
content: This is one of eight models of rules surfaces having a chrome frame given to the Smithsonian by Brown University (see MA.304722.35 through MA.304722.42). All these models are unsigned. Models of this general appearance were shown by Saul Pollock of Indiana State Teacher’s College in Terre Haute, Indiana, at the Century of Progress world’s fair, held in Chicago in 1934. A. Harry Wheeler, a mathematics teacher and maker of geometric models, visited the fair and noted Pollock’s models. Wheeler also communicated with mathematicians at Brown, and exhibited some of his models there. The models might be by Pollock, they might be copies by Wheeler.
label: Description
content: References:
label: Description
content: Century of Progress, <I>Official Handbook of Exhibits in the Division of the Basic Sciences Hall of Science</I>, Chicago, 1934, p. 39-40, 43.
label: Description
content: P.A. Kidwell, “American Mathematics Viewed Objectively: The Case of Geometric Models,” <I>Vita Mathematica</I>, ed. Ronald Calinger, Washington, DC: Mathematical Association of America, 1996, pp. 197-207.
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 Brown University Department of Mathematics
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.304722.35
label: catalog number
content: 304722.35
label: accession number
content: 304722
objectType: label: Object Name
content: Geometric Model
label: Object Name
content: geometric model
physicalDescription: label: Physical Description
content: chrome (overall material)
label: Physical Description
content: thread (overall material)
label: Measurements
content: overall: 55 cm x 43 cm x 43 cm; 21 21/32 in x 16 15/16 in x 16 15/16 in