Dietzgen 1298-B Blackboard Ruler
- Description
- 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.
- 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.
- References: Catalogue & Price List of Eugene Dietzgen Co., 7th ed. (Chicago, 1904), 151; Catalogue & Price List of Eugene Dietzgen Co., 9th ed. (Chicago, 1910–1911), 194; Catalogue & Price List of Eugene Dietzgen Co., 15th ed. (Chicago, 1938), 210.
- Location
- Currently not on view
- date made
- ca 1950
- maker
- Eugene Dietzgen Company
- place made
- United States: Illinois, Chicago
- Physical Description
- wood (overall material)
- Measurements
- overall: 2 cm x 92.6 cm x 5.3 cm; 25/32 in x 36 15/32 in x 2 3/32 in
- ID Number
- 1999.0160.01
- catalog number
- 1999.0160.01
- accession number
- 1999.0160
- Credit Line
- Gift of Montgomery College, Takoma Park, Md.
- subject
- Mathematics
- Rule, Measuring
- Education, College
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- Scale Rules
- Data Source
- National Museum of American History
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