J. L. Hammett Co. Open Triangle
date: label: date made
content: 1895-1967
name: label: maker
content: J. L. Hammett Co.
notes: label: Description
content: The interior of this 20-1/2" 30°-60°-90° fiberboard triangle is divided into two open triangles that are approximately 45°-60°-75° and 30°-45°-105°. The hypotenuse is marked: J. L. HAMMETT CO. (/) CAMBRIDGE, MASS. (/) NEWARK, N.J. The instrument is sized for blackboard use. It has no markings for measuring angles or lengths.
label: Description
content: John Hammett began selling erasers and slating paint for chalkboards in Rhode Island in 1863, moving to Boston in 1865. In 1890 new owners expanded the firm into all forms of paper school supplies. Now called the J. L. Hammett Co., the firm opened factories in New York, New Jersey, and Massachusetts after 1895; moved its headquarters to Braintree, Mass., in 1967; and operated over 50 retail stores from 1974 to 2005. Neither this drawing instrument nor MA.304722.44 appear in Hammett catalogs published between about 1870 and 1903. The Department of Mathematics at Brown University gave this object to the Museum in 1973.
label: Description
content: References: Bill Lane, "School Supplier J. L. Hammett to Close Stores," <i>Boston Business Journal</i>, January 4, 2005, http://www.bizjournals.com/boston/stories/2005/01/03/daily12.html; "J. L. Hammett Company," <i>The Play and Playground Encyclopedia</i>, http://www.pgpedia.com/j/jl-hammett-company.
label: Location
content: Currently not on view
place: label: place made
content: United States
topic: label: Subject
content: Mathematics
label: Subject
content: Education
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.304722.45
label: catalog number
content: 304722.45
label: accession number
content: 304722
objectType: label: Object Name
content: triangle
physicalDescription: label: Physical Description
content: tempered fiberboard (overall material)
label: Measurements
content: overall: 61 cm x 26.8 cm x .3 cm; 24 1/32 in x 10 9/16 in x 1/8 in