Calculating Disc, Sherrill Compass Deviation Calculator, Felsenthal FAO-2
date: label: date made
content: ca 1943
label: date made
content: ca 1944
name: label: maker
content: Felsenthal Instrument Co.
label: maker
content: Felsenthal Instrument Co.
notes: label: Description
content: According to marks on this small plastic instrument, it was “furnished” by the Sherrill Research Corporation of Peru, Indiana, and copyrighted in 1944. At that time, Sherrill was making compasses for the U.S. military and sold this calculator to easily correct compass readings. Instructions are on it.
label: Description
content: According to a tag received with the object, Felsenthal made the instrument for the U.S. Army as the FAO-2 and sold it in 1943.
label: Location
content: Currently not on view
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Military
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content: Science & Mathematics
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content: Measuring & Mapping
creditLine: label: Credit Line
content: Gift of Ben Wharton Rau and Margery Felsenthal Rau
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1977.1141.15
label: catalog number
content: 336399
label: accession number
content: 1977.1141
objectType: label: Object Name
content: Calculating Disc
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: .1 cm x 8.5 cm x 11.4 cm; 1/32 in x 3 11/32 in x 4 1/2 in