Instructions for Keuffel & Esser 4013 Thacher Cylindrical Slide Rule
date: label: date made
content: 1907
name: label: maker
content: Keuffel & Esser Co.
notes: label: Description
content: Edwin Thacher, the inventor of the cylindrical slide rule bearing his name, published instructions for using the instrument as <i>Thacher's Calculating Instrument or Cylindrical Slide-Rule</i> (New York: Van Nostrand, 1884). Keuffel & Esser of New York, which distributed and, later, manufactured Thacher slide rules, reprinted the booklet in 1903 and 1907 as <i>Directions for Using Thacher's Calculating Instrument</i>. This copy was printed in 1907 and sold for one dollar.
label: Description
content: The booklet explained the processes for calculations involving multiplication, division, proportion, powers, and square and cube roots. Thacher also provided solved examples for practice. He suggested "special applications" for his instrument, including conversion of weights and measures; currency exchange; pro-rating among accounts; calculating taxes, investment returns, and payrolls; and physical computations such as mechanical power, centrifugal force, and mensuration. K&E's Improved Reckoning Machine is advertised at the back of the booklet.
label: Description
content: See also MA.327886.
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: Education
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 the Museum of Science and Industry, Chicago
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.271855.01.03
label: accession number
content: 271855
label: catalog number
content: 271855.01.03
objectType: label: Object Name
content: book
physicalDescription: label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: 22.3 cm x 14.8 cm x .5 cm; 8 25/32 in x 5 13/16 in x 3/16 in