Rule
date: label: Date made
content: ca 1900
notes: label: Description
content: This wooden rectangular rule consists of an inch scale marked from zero to 6 and divided by tenths, a scale marked from zero to 50 and divided into units (10 units is approximately 3 cm), and diagonal scales for tenths and eighths. On the reverse side of the rule, there are scales of equal parts dividing the inch into 15, 20, 25, 30, 35, and 40. This side also contains a scale of chords. One edge of the rule is scalloped. There is no maker's mark, but the rule probably dates from the late 1800s or early 1900s.
label: Description
content: The donor operated his family's building company, where he displayed his collection of 1200 hand tools.
label: Location
content: Currently not on view
topic: label: Subject
content: Mathematics
label: Subject
content: Drafting, Engineering
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
label: See more items in
content: Scale Rules
creditLine: label: Credit Line
content: The John R. Gerwig, Jr., Collection
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1977.1101.018
label: catalog number
content: 1977.1101.018
label: accession number
content: 1977.1101
objectType: label: Object Name
content: Rule
label: Object Name
content: scale rule
physicalDescription: label: Measurements
content: overall: .1 cm x 15.4 cm x 3.4 cm; 1/32 in x 6 1/16 in x 1 11/32 in