This 19" wooden T-square has a curved top piece attached to the handle by two steel screws. The back of the top piece has a ridge for positioning against a table. A hole at the end of the handle is for hanging the instrument. It has no markings. The dating of other objects from this donor suggests this object was made about 1900. Compare to MA*328396 and MA*328398.
Currently not on view
Object Name
date made
ca 1900
Physical Description
steel (overall material)
wood (overall material)
overall: 48.4 cm x 20.6 cm x .6 cm; 19 1/16 in x 8 1/8 in x 1/4 in
ID Number
accession number
catalog number
Squares and Triangles
Science & Mathematics
Drawing Instruments
Drafting, Engineering
See more items in
Medicine and 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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