Japanese Scale Rule with Caliper


An iron caliper with only one bar is nailed to one end of this bamboo rule. The caliper extends back about 3". The ruler is divided into 17 units of 1-3/16" (3 cm), and the units are subdivided into tenths. Each unit is roughly equivalent to one sun, a traditional Japanese unit of length that is 1/10 of a shaku, a "foot" measure. Bulls-eyes mark every five units. A red and white sticker on the caliper is marked: 10th (/) No 222.

The Japanese Empire Department of Education displayed this rule at the 1876 Centennial Exhibition in Philadelphia. It then was held by the Museum of the U.S. Bureau of Education until it was transferred to the Smithsonian in 1910. For more information, see MA.261298 and MA.261313.

Date Made: before 1876

Location: Currently not on view

Place Made: Japan

Subject: MathematicsRule, MeasuringExpositions and FairsCarpentry


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.261299Catalog Number: 261299Accession Number: 51116

Object Name: scale rule and caliperrule

Physical Description: bamboo (overall material)iron (overall material)Measurements: overall: 1.8 cm x 61 cm x 7.5 cm; 23/32 in x 24 1/32 in x 2 15/16 in

Guid: http://n2t.net/ark:/65665/ng49ca746aa-ad5a-704b-e053-15f76fa0b4fa

Record Id: nmah_1215116

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