Pickett 101-C Circular Slide Rule
date: label: date made
content: ca 1958
name: label: maker
content: Pickett & Eckel, Incorporated
notes: label: Description
content: This yellow aluminum circular slide rule has three clear plastic indicators, one blank. The other indicator on the front is marked in red to denote the C, CI, A, A<sup>F</sup>, L, F<sup>A</sup>, LL2, LL1, DS, DT, and M scales. The indicator on the back is marked in red to denote the C, S,ST, and T scales. A ring of numbers under the scales on the back permits conversions from fractions to decimals.
label: Description
content: The center of the front is marked: CIRCULAR SLIDE RULE – dial rule (/) PICKETT. The center of the back is marked: dial rule (/) NO 101-C. A triangular Pickett logo, of the form used between 1950 and 1958, appears at the bottom of the center; CHICAGO is printed below the logo.
label: Description
content: Pickett & Eckel, a slide rule manufacturer based in Chicago and Alhambra, Calif., distributed a small booklet with this instrument, one of the few circular slide rules sold by the company and possibly the only circular model it manufactured. Maurice L. Hartung, a University of Chicago mathematics professor associated with the company, wrote the instruction manual (1981.0922.13). The booklet is copyrighted 1957, and the logo on this copy was used by the company between 1958 and 1962. Thus, this slide rule dates to about 1958.
label: Description
content: References: Rodger Shepherd, "Pickett Metal Slide Rules," <i>Journal of the Oughtred Society</i> 1, no. 1 (1992): 5–8; Walter Shawlee, "Information About Pickett Slide Rules," <i>Sphere Research Slide Rule Site</i>, http://www.sphere.bc.ca/test/pickett.html.
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, Chicago
topic: label: Subject
content: Rule, Calculating
label: Subject
content: Mathematics
label: Subject
content: Engineering, General
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Science & Mathematics
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content: Slide Rules
creditLine: label: Credit Line
content: Gift of John White
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1981.0922.12
label: catalog number
content: 1981.0922.12
label: accession number
content: 1981.0922
objectType: label: Object Name
content: calculating rule
label: Object Name
content: slide rule
physicalDescription: label: Physical Description
content: aluminum (overall material)
label: Physical Description
content: plastic (cursor material)
label: Measurements
content: overall: 1 cm x 11.8 cm x 11.8 cm; 13/32 in x 4 21/32 in x 4 21/32 in