Hart Combination Protractor, Rule, and Square
Hart Combination Protractor, Rule, and Square
- 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
- Science & Mathematics
- Protractors
- Data Source
- National Museum of American History
Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.
If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.
Comments
Note: Comment submission is temporarily unavailable while we make improvements to the site. We apologize for the interruption. If you have a question relating to the museum's collections, please first check our Collections FAQ. If you require a personal response, please use our Contact page.
Donna Hartmann
Tue, 2022-02-01 13:29