Scale Rule Signed Carl Zeiss
date: label: date made
content: 1891–1902
name: label: maker
content: Zeiss
notes: label: Description
content: This rectangular transparent glass ruler has a millimeter scale numbered by tens from 0 to 200. It is marked: Carl Zeiss, (/) Jena. The rule is cracked in the lower left corner. A tan envelope is made from folded paper.
label: Description
content: In 1846 Carl Zeiss established a workshop in Jena, Germany, that became known for microscopes, telescopes, and photographic lenses. The firm sold this rule for making measurements on drawings and photographs for 5 marks at least as early as 1891. By 1902, it was numbered model 134 and described as a 20-cm rule instead of a 200-mm rule. The new price of 7 marks increased to 8 marks in 1906. The Department of Entomology at the National Museum of Natural History used this rule to study its collections.
label: Description
content: References: Carl Zeiss Jena, Microscopes and Microscopic Accessories, 29th ed. (Jena, 1891), 75; 31st ed. (Jena, 1898), 75; 32nd ed. (Jena, 1902), 96; 33rd ed. (Jena, 1906), 79.
label: Location
content: Currently not on view
place: label: place made
content: Germany: Thuringia, Jena
topic: label: Subject
content: Mathematics
label: Subject
content: Rule, Measuring
label: Subject
content: Drawing Instruments
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
creditLine: label: Credit Line
content: Transfer from National Museum of Natural History, Department of Entomology
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1990.0099.03
label: accession number
content: 1990.0099
label: catalog number
content: 1990.0099.03
objectType: label: Object Name
content: rule
label: Object Name
content: scale rule
physicalDescription: label: Physical Description
content: glass (overall material)
label: Measurements
content: overall: .3 cm x 22.3 cm x 3.7 cm; 1/8 in x 8 25/32 in x 1 15/32 in