Plotting Scale

Description:

On one side this brass rule has an unnumbered scale of chords and architect's scales for making drawings at proportions of 1/5", 1/4", 1/3", 1/2", and 1" to the foot. The other side has 8" plotting scales with diagonal scales at each end. One plotting scale is divided to 1" and numbered by ones from 1 to 8, and the other is divided to 1/2" and numbered by ones from 1 to 16. A badly worn leather sleeve may not be original to the instrument. Compare to 1980.0676.01.

The Smithsonian's Division of Ethnology received this rule in 1951 and believed it to be of American manufacture.

Date Made: 19th century

Location: Currently not on view

Place Made: United States

Subject: MathematicsDrafting, Engineering

Subject:

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

Exhibition:

Exhibition Location:

Credit Line: Gift of Dr. and Mrs. Arthur M. Greenwood

Data Source: National Museum of American History

Id Number: MA.388991.02Accession Number: 182022Catalog Number: 388991

Object Name: scale, plottingscale rule

Physical Description: brass (overall material)leather (overall material)Measurements: overall: .1 cm x 15.4 cm x 3.1 cm; 1/32 in x 6 1/16 in x 1 7/32 in

Guid: http://n2t.net/ark:/65665/ng49ca746aa-9fe1-704b-e053-15f76fa0b4fa

Record Id: nmah_1214078

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