Russian Circular Slide Rule
date: label: date made
content: 1967
notes: label: Description
content: This circular slide rule is the size of a pocket watch. It has a metal band around the edge and glass cover on the front and back. Each side of the rule has a pointer pivoted at the center, with its motion controlled by a knob along the edge. On one side, the outer edge is divided logarithmically from 1 to 100 and the inner edge from 1 to 10. Rotating the pivot allows one to find squares and square roots of numbers. The other side has a spiral scale on the inside that runs from 1 to 54 and appears to allow one to find tangents on the outer edge. It appears to have a scale of sines on the outside. The marks are in Russian.
label: Description
content: A paper sheet of instructions accompanies the slide rule. The rule fits in a cardboard box.
label: Location
content: Currently not on view
place: label: place made
content: Soviet Union
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: Slide Rules
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content: Arithmetic Teaching
creditLine: label: Credit Line
content: Gift of Laszlo Kutor
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2014.0136.01
label: accession number
content: 2014.0136
label: catalog number
content: 2014.0136.01
objectType: label: Object Name
content: slide rule
physicalDescription: label: Physical Description
content: metal (edge, knobs material)
label: Physical Description
content: glass (coverpieces material)
label: Physical Description
content: paper (box, instructions material)
label: Physical Description
content: plastic (pointers material)
label: Measurements
content: overall: 2.1 cm x 5.7 cm x 6 cm; 13/16 in x 2 1/4 in x 2 3/8 in