Keuffel & Esser Log Log Duplex Decitrig Slide Rule Documentation

Object Details

Keuffel & Esser Co.

Description: This green softcover instruction manual, advertising pamphlet for various pocket-sized Keuffel & Esser slide rules, and leaflet on "How to Take Care of Your Slide Rule" were received with 2007.0181.01. The citation information for the manual is: Lyman M. Kells, Willis F. Kern, and James R. Bland, Slide Rule Manual: Log Log Duplex Decitrig, 4th ed. (New York: Keuffel & Esser Co., 1955). Kells, Kern, and Bland were all mathematics professors at the U.S. Naval Academy. The cover indicates that the manual is model "No. 68 2047 (/) OLD NO. 4187S," suggesting it was printed after 1962, when K&E changed all of its model numbers. The 125-page manual is designed for self-study and covers multiplication and division; proportion; squares, cubes, and roots; trigonometry; the log log scales; and logarithms and the slide rule. Answers to the exercises are in the back of the manual. See also 1987.0085.02.; The pamphlet is marked with the motto: calculate wherever you circulate. It measures 2-1/4 X 8-1/4 inches and was copyrighted in 1960, 1962, and 1964. Information is provided for five-inch versions of K&E's Deci-Lon, Jet-log Jr., Polyphase Duplex Decitrig, Modern Polyphase, Polyphase, and Merchants slide rules. The leaflet is small (4 X 3 inches) and 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.
Location: Currently not on view

1964

Physical Description: paper (overall material)
Measurements: overall: 20.5 cm x 13.5 cm x 1 cm; 8 1/16 in x 5 5/16 in x 13/32 in

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National Museum of American History

GUID (Link to Original Record): https://n2t.net/ark:/65665/ng49ca746ad-93d8-704b-e053-15f76fa0b4fa