Square Wood Rule or Calculating Stick
date: label: date made
content: 19th century
notes: label: Description
content: This large wood rule has a square cross-section and rounded edges. Metal plates are screwed into both ends. The rule is covered with numbers placed at one-inch intervals. One corner is numbered by ones from 1 to 60 and labeled "Height." "Wood Rule" is written above the scale. Adjacent to the 11 on this scale are listed 15 "Widths" in intervals of one inch, ranging from 3'2" to 4'4". Next to each Width, and adjacent to the numbers 12–60 on the Height scale, are lists of numbers. Each number is eight times the product of the height and width, with both of these taken in feet (i.e., the 12 is assumed to represent one foot). The numbers in the lists are rounded off to the nearest whole number.
label: Description
content: The National Museum of History and Technology, now the National Museum of American History, acquired this calculating stick, probably between 1962 and 1965, for its Growth of the United States exhibition, which opened in 1967 and closed in 1982. What the original owner was measuring with these calculations is not known.
label: Description
content: Reference: William S. Walker, "A Living Exhibition: The Smithsonian, Folklife, and the Making of the Modern Museum" (Ph.D. diss., Brandeis University, 2007).
label: Location
content: Currently not on view
place: label: place made
content: United States
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: Scale Rules
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1987.0107.05
label: accession number
content: 1987.0107
label: catalog number
content: 1987.0107.05
objectType: label: Object Name
content: calculating rule
label: Object Name
content: rule
physicalDescription: label: Physical Description
content: wood (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 2.8 cm x 154.4 cm x 2.8 cm; 1 3/32 in x 60 25/32 in x 1 3/32 in