Dietzgen 1298-B Blackboard Rule
date: label: date made
content: ca 1950
name: label: maker
content: Eugene Dietzgen Company
notes: label: Description
content: This three-foot wooden rule was sold as part of a set of instruments for blackboard use. It is divided to 1/8" along one edge and numbered in red for feet and in black for inches. A horizontal handle in the center of the rule assists with positioning it against the blackboard, and a round hole at the right end is for hanging the instrument. The lower right corner is marked: DIETZGEN (/) MADE IN U.S.A. (/) 1298-B.
label: Description
content: The Eugene Dietzgen Company of Chicago began numbering its blackboard drawing instruments individually by 1910, when it priced the four pieces at $1.25 each or $5.00 for the set. However, through at least 1938, the handle on the ruler was shaped like a knob, not as a horizontal bar. For related object, see 1999.0117.02.
label: Description
content: The instrument was used by Margaret G. Aldrich teaching mathematics at Montgomery College, established as Montgomery Junior College in Takoma Park, Maryland.
label: Description
content: References: <i>Catalogue & Price List of Eugene Dietzgen Co.</i>, 7th ed. (Chicago, 1904), 151; <i>Catalogue & Price List of Eugene Dietzgen Co.</i>, 9th ed. (Chicago, 1910–1911), 194; <i>Catalogue & Price List of Eugene Dietzgen Co.</i>, 15th ed. (Chicago, 1938), 210.
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, Chicago
topic: label: Subject
content: Mathematics
label: Subject
content: Rule, Measuring
label: Subject
content: Education, College
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Women Teaching Math
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content: Science & Mathematics
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content: Scale Rules
creditLine: label: Credit Line
content: Gift of Montgomery College, Takoma Park, Md.
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1999.0160.01
label: catalog number
content: 1999.0160.01
label: accession number
content: 1999.0160
objectType: label: Object Name
content: scale rule
label: Object Name
content: rule
physicalDescription: label: Physical Description
content: wood (overall material)
label: Measurements
content: overall: 2 cm x 92.6 cm x 5.3 cm; 25/32 in x 36 15/32 in x 2 3/32 in