Japanese Scale Rule with Chain


This brass rule with chain was displayed by the Japanese Empire Department of Education at the 1876 Centennial Exhibition in Philadelphia and then was held by the Museum of the U.S. Bureau of Education before transfer to the Smithsonian in 1910. The scale on the rule has six units of 19/32" (1.5 cm). Two of the units are subdivided into 25 parts; the other two are subdivided into ten parts. The chain is approximately 29-1/2" (75 cm) long and is attached to an eye at one end of the rule. Larger links are inserted in the chain at 12" and 24" from the rule. A small octagonal weight (about 1/2" or 1.5 cm long) is attached to the end of the chain.

The accession record identifies this instrument as a ryosan shaku (depth gauge for cannon barrels). For more information on the exhibition, see MA.261298 and MA.261313.

Date Made: before 1876

Location: Currently not on view

Place Made: Japan

Subject: MathematicsExpositions and FairsGauging


See more items in: Medicine and Science: Mathematics, Science & Mathematics, Scale Rules


Exhibition Location:

Credit Line: Transfer from Bureau of Education, Department of the Interior

Data Source: National Museum of American History

Id Number: MA.261289Accession Number: 51119Catalog Number: 261289

Object Name: scale rulerule

Physical Description: brass (overall material)Measurements: overall: 1.1 cm x 88.2 cm x 1.1 cm; 7/16 in x 34 23/32 in x 7/16 in

Guid: http://n2t.net/ark:/65665/ng49ca746aa-ad59-704b-e053-15f76fa0b4fa

Record Id: nmah_1215115

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