Pickett Decimal-Keeper Slide Rule Instructions
date: label: date made
content: ca 1960
name: label: maker
content: Pickett & Eckel, Incorporated
notes: label: Description
content: This twelve-page booklet was received with 1995.0126.01. Titled "How To Use Decimal-Keeper Slide Rules," it is another of the instruction manuals Maurice L. Hartung wrote for Pickett & Eckel, Inc., a slide rule manufacturer based in Chicago and Alhambra, Calif. Hartung explained how Pickett had reduced the scales on slide rules in the Decimal-Keeper line so that one ten-inch Decimal-Keeper became equivalent to twenty ordinary ten-inch linear slide rules. These reduced scales are the scales marked with asterisks on Decimal-Keeper slide rules.
label: Description
content: There are also instructions for locating the proper section of the scale, carrying out division, computing trigonometric functions, calculating roots, finding logarithms, and adjusting and cleaning the slide rule. The booklet is undated. Separately, it sold for 50 cents and had model number M-17.
label: Location
content: Currently not on view
place: label: place made
content: United States: California, Alhambra
topic: label: Subject
content: Mathematics
label: Subject
content: Rule, Calculating
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 Lawrence J. Kamm
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1995.0126.04
label: accession number
content: 1995.0126
label: catalog number
content: 1995.0126.04
objectType: label: Object Name
content: pamphlet
physicalDescription: label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: .2 cm x 14 cm x 21.7 cm; 3/32 in x 5 1/2 in x 8 17/32 in