Hemmi-Sun Mannheim Slide Rule


This small (4-inch) one-sided rule is bamboo with a metal backing, entirely covered with white celluloid. A magnifying glass indicator has a metal frame. There are A and D scales on the base. The slide has B and C scales on one side and S, L, and T scales on the other side. The lower edge of the base has a scale of centimeters divided to millimeters. The upper edge of the base has a scale of inches divided to thirty-seconds of an inch.

The D scale is marked at each end: Quot (/) +1; Prod (/) -1. The back of the slide rule is marked: "SUN" (between two drawings of the sun); HEMMI; MADE IN JAPAN. A brown leather case is stamped in gold on the flap: BAMBOO (/) SLIDE RULE (/) "SUN" (between two drawings of the sun) (/) HEMMI. Written in pen inside the flap is: BOB YINGLING.

According to the donor, a colleague used this slide rule in a training program at the American Brass Company Division of Anaconda Mining Company in Waterbury, Conn., in the 1940s. He used it for such problems as calculating the weight of samples from their volume and density.

Date Made: ca 1940


Location: Currently not on view

Place Made: Japan: Japan

Subject: MathematicsRule, CalculatingGeneral Calculation


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


Exhibition Location:

Credit Line: Gift of William E. Gilbert

Data Source: National Museum of American History

Id Number: 1995.0087.01Accession Number: 1995.0087Catalog Number: 1995.0087.01

Object Name: calculating ruleslide rule

Physical Description: celluloid (laminate material)bamboo (overall material)leather (case material)Measurements: overall: 1.6 cm x 13.1 cm x 3.4 cm; 5/8 in x 5 3/16 in x 1 5/16 in

Guid: http://n2t.net/ark:/65665/ng49ca746a5-1454-704b-e053-15f76fa0b4fa

Record Id: nmah_690051

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.