Object Details
Maker
Keuffel & Esser Co.
Description
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.
References: Catalogue and Price List of Keuffel & Esser Co., 33rd ed. (New York, 1909), 208; Catalogue of Keuffel & Esser Co., 38th ed. (New York, 1936), 229.
Location
Currently not on view
Credit Line
Gift of Brown University Department of Mathematics
date made
early 20th century
ID Number
MA.304722.08
catalog number
304722.08
accession number
304722
Object Name
triangle
Physical Description
plastic (overall material)
Measurements
overall: 11.6 cm x 19.5 cm x .1 cm; 4 9/16 in x 7 11/16 in x 1/32 in
place made
United States: New York, New York City
See more items in
Medicine and Science: Mathematics
Squares and Triangles
Science & Mathematics
Data Source
National Museum of American History
Subject
Mathematics
Drawing Instruments
Link to Original Record
Record ID
nmah_904224