Object Details
- Description
- In the 1970s, after metric units of measure had been adopted in Canada and Great Britain, some people in the United States advocated adoption of the metric system. The National Bureau of Standards of the U. S. Department of Commerce prepared this white plastic reference card to assist those wishing to use the unfamiliar units of measure. One side gave approximate conversion factors for computing metric measures from customary measures of length, area, mass and volume. This side also has a scale eight centimeters long divided to millimeters, and a chart with temperatures in degrees Fahrenheit along the top and temperatures in degrees centigrade along the bottom.
- The other side of the card gives factors for converting from metric to common measures of length, area, mass, volume, and temperature. There also is a scale three inches long divided to 1/16th of an inch.
- The card was a gift of machinist George A. Norton, a longtime employee of the National Museum of American History.
- Location
- Currently not on view
- Data Source
- National Museum of American History
- maker
- U.S. Department of Commerce, National Bureau of Standards
- date made
- 1972
- Credit Line
- Gift of George A. Norton III
- Physical Description
- plastic (overall material)
- Measurements
- overall: .1 cm x 6.2 cm x 9.2 cm; 1/32 in x 2 7/16 in x 3 5/8 in
- Object Name
- mathematical table
