Keuffel & Esser 68-2047 Log Log Duplex Decitrig Manual and S14-5 Care Instructions
date: label: date made
content: 1955-1962
name: label: author
content: Kells, Lyman M.
label: author
content: Kern, Willis F.
label: author
content: Bland, James R.
label: publisher
content: Keuffel & Esser Co.
notes: label: Description
content: ID number 1987.0085.01, a model 68–1210 Log Log Duplex Decitrig slide rule by Keuffel & Esser of New York, was received with these two paperback booklets. The citation information for the first booklet is: Lyman M. Kells, Willis F. Kern, and James R. Bland, <i>K&E Slide Rule Manual: Log Log Duplex Decitrig</i>, 4th ed. (New York: Keuffel & Esser Co., 1955). Kells, Kern, and Bland were all mathematics professors at the United States Naval Academy; they first prepared this manual in 1943. They designed the book for students to learn to operate slide rules on their own, without the aid of a teacher.
label: Description
content: The manual covers the following topics: multiplication and division; the proportion principle and combined operations; squares and square roots, cubes and cube roots; trigonometry; the log log scales; and logarithms and the slide rule. Included are exercises, answers, and a historical note (featuring K&E's contributions to the development of slide rules). The manual was previously K&E model number 4187S.
label: Description
content: The second pamphlet is small (4 X 3 inches) and titled: "How to Take Care of Your Slide Rule." It was copyrighted in 1944, 1949, 1958, and 1962. Users are to clean the slide rule only with a moistened cloth. Instructions are provided for adjusting and aligning the slide rule.
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, New York City
topic: label: Subject
content: Mathematics
label: Subject
content: Rule, Calculating
label: Subject
content: Education
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Science & Mathematics
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content: Trigonometry
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content: Slide Rules
creditLine: label: Credit Line
content: Gift of Howard Ebenstein
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1987.0085.02
label: accession number
content: 1987.0085
label: catalog number
content: 1987.0085.02
objectType: label: Object Name
content: pamphlet
physicalDescription: label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: 20.3 cm x 13.3 cm; 8 in x 5 1/4 in