Hart Combination Protractor, Rule, and Square
Hart Combination Protractor, Rule, and Square
Usage conditions apply
- Description
- This paper semicircular protractor is divided by degrees and marked by tens from 10 to 170 degrees in both directions. The letter A is printed in the bottom left corner of the protractor, and B is printed in the bottom right corner of the protractor. Centered under the origin point of the protractor is printed the inventor's mark: Combination Protractor, Rule, and Square (/) W. W. Hart, University of Wisconsin.
- A ruler along the top edge is divided to 1/8-inch and marked by ones from 0 to 5. A ruler along the bottom edge is divided to millimeterS and marked by ones from 0 to 12. The typeface of the inventor's mark is similar to that shown in Hart's textbooks published in the 1920s, such as Walter Wilson Hart, Junior High School Mathematics, vol. 1 (Boston: D. C. Heath & Co., 1921), vii, 131. See also MA.304722.06.
- Location
- Currently not on view
- Object Name
- protractor
- date made
- ca 1925
- designer
- Hart, Walter Wilson
- place made
- United States: Wisconsin, Madison
- Physical Description
- paper (overall material)
- Measurements
- overall:.1 cm x 13.5 cm x 8.2 cm; 1/32 in x 5 5/16 in x 3 7/32 in
- ID Number
- MA.304722.07
- accession number
- 304722
- catalog number
- 304722.07
- Credit Line
- Gift of Brown University Department of Mathematics
- subject
- Mathematics
- Protractor
- Education, High School
- See more items in
- Medicine and Science: Mathematics
- Protractors
- Science & Mathematics
- Data Source
- National Museum of American History
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