Japanese Combination Set Square and Protractor

Description
This brass instrument combines a set square and a portion of a protractor. A scale along the outside of the long beveled edge of the set square is divided into units about 15/16 inches long, subdivided to twentieths. A scale of equal parts runs along the curved rim which is adjacent to and outside the short edge of the set square. Neither scale has numbers.
The object was received with group of Japanese instruments exhibited at the Centennial Expositon, a world's fair held in Philadelphia in1876.
Location
Currently not on view
date made
ca 1876
place made
Nihon
Physical Description
metal (overall material)
Measurements
overall: .2 cm x 17 cm x 7.7 cm; 3/32 in x 6 11/16 in x 3 1/32 in
ID Number
MA.261312
accession number
51116
catalog number
261312
Credit Line
Transfer from Bureau of Education, Department of the Interior
subject
Mathematics
Drafting, Engineering
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Single Drawing Instruments
Data Source
National Museum of American History, Kenneth E. Behring Center

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