Slide Rule, Caliputer
date: label: date made
content: ca 1960
label: date made
content: 1967
name: label: maker
content: Gemini Engineering
notes: label: Description
content: This stainless steel instrument combines the functions of a slide rule, a vernier caliper, and a vernier depth gauge. The moveable calipers are along the top edge. Adjacent to them on one side is a scale four inches long, divided to fortieths of an inch and to sixty-fourths of an inch. Below this are a C scale (on the slide) and a D scale (on the base). The other side has, next to the caliper, is a scale a scale equally divided from 0 to 13. Measuring the diameter of a circular object with this scale, one can read off the circumference. The scale is labeled: CIRCUMFERENCE-INCHES. The slide on this side has scales labeled A and B that are visible through a window in the metal. The scale labeled A is marked: READ (/) CIRCULAR (/) AREAS. It is divided logarithmically and runs from 0 to 4. The scale labeled B is marked: SQUARE AND (/) SQUARE ROOTS. It is divided logarithmically and runs from 0 to 1.
label: Description
content: The instrument is stored in a pocket-sized leather case with metal trim. For a folded sheet of instructions, see 1981.0992.19.1.
label: Location
content: Currently not on view
place: label: place made
content: United States: Texas, Houston
topic: label: Subject
content: Mathematics
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: Slide Rules
creditLine: label: Credit Line
content: Gift of John White
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1981.0922.19
label: accession number
content: 1981.0922
label: catalog number
content: 1981.0922.19.1
objectType: label: Object Name
content: calculating rule
label: Object Name
content: slide rule
physicalDescription: label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: .3 cm x 5.5 cm x 14.2 cm; 1/8 in x 2 3/16 in x 5 9/16 in