Calculating Disc, Sherrill Compass Deviation Calculator, Felsenthal FAO-2
- Description
- 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.
- 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.
- Location
- Currently not on view
- date made
- ca 1943
- ca 1944
- maker
- Felsenthal Instrument Co.
- Felsenthal Instrument Co.
- Physical Description
- plastic (overall material)
- Measurements
- overall: .1 cm x 8.5 cm x 11.4 cm; 1/32 in x 3 11/32 in x 4 1/2 in
- ID Number
- 1977.1141.15
- catalog number
- 336399
- accession number
- 1977.1141
- Credit Line
- Gift of Ben Wharton Rau and Margery Felsenthal Rau
- subject
- Mathematics
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- Measuring & Mapping
- Military
- Data Source
- National Museum of American History
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