A wooden bar (6-1/8" x 2" x 3/4") is attached to a flat wooden handle (17-7/8" x 2" x 1/8") by nine wooden pegs. By the 17th century, draftsmen used T-squares to help them draw horizontal lines. The instrument was also used in conjunction with a set square or triangle to draw vertical and diagonal lines. The dating of other objects from this donor suggests this object was made about 1900. Compare to MA*328397 and MA*328398.
Reference: Maya Hambly, Drawing Instruments, 1580–1980 (London: Sotheby's Publications, 1988), 113.
Currently not on view
Object Name
date made
ca 1900
Physical Description
metal (overall material)
wood (overall material)
overall: 45.6 cm x 15.6 cm x 2 cm; 17 15/16 in x 6 5/32 in x 25/32 in
ID Number
accession number
catalog number
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Squares and Triangles
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Eunice L. Hoffman
Additional Media

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