Keuffel & Esser 1855 8" Drafting Triangle
date: label: date made
content: early 20th century
name: label: Maker
content: Keuffel & Esser Co.
notes: label: Description
content: This 7-3/4" 30°-60°-90° yellowed plastic triangle was originally transparent and 8" tall. Like many plastic objects from the early 20th century, it is rapidly deteriorating. A small triangular hole in the interior has notches or bevels around its edges. The object is marked along the short edge: KEUFFEL & ESSER Co. (/) N. Y.; 8; TRADE MARK (below the K&E eagle logo). By 1909 K&E offered xylonite triangles for use in engineering drawing; the 8-inch size sold for 55¢. By 1936 the price was 50¢. The Department of Mathematics at Brown University gave this object to the Museum in 1973.
label: Description
content: References: <i>Catalogue and Price List of Keuffel & Esser Co.</i>, 33rd ed. (New York, 1909), 208; <i>Catalogue of Keuffel & Esser Co.</i>, 38th ed. (New York, 1936), 229.
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, New York City
topic: label: Subject
content: Mathematics
label: Subject
content: Drawing Instruments
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Squares and Triangles
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Brown University Department of Mathematics
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.304722.08
label: catalog number
content: 304722.08
label: accession number
content: 304722
objectType: label: Object Name
content: triangle
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: 11.6 cm x 19.5 cm x .1 cm; 4 9/16 in x 7 11/16 in x 1/32 in