Case for semicircular single-arm protractor by Kleman and Son
Case for semicircular single-arm protractor by Kleman and Son, Amsterdam
- Object Number:
- 1919-291 Pt1
- type:
- instrument case
- Image ©
- The Board of Trustees of the Science Museum
Semicircular single-arm protractor in case: by J.M. Kleman and Son
- Made:
- Amsterdam
Semicircular single-arm protractor in case: by J.M. Kleman and Son, Amsterdam, early 18tyh century. Diameter 6 11/ 16" divided to 1/2 degrees, reads by vernier to 1 minute of arc
Details
- Category:
- Mathematics
- Object Number:
- 1919-291
- type:
- drawing instruments and semi-circular protractors
- credit:
- Thomas H. Court
Parts
Semicircular single-arm protractor by J.M. Kleman and Son
Semicircular single-arm protractor by J.M. Kleman and Son, Amsterdam, early 18th century. Diameter 6 11/ 16" divided to 1/2 degrees, reads by vernier to 1 minute of arc.
- Measurements:
-
overall: 9 mm x 355 mm x 172 mm, 0.264 kg
- Materials:
- brass (copper, zinc alloy) and metal (unknown)
- Object Number:
- 1919-291 Pt2
- type:
- drawing instruments and semi-circular protractors
- Image ©
- The Board of Trustees of the Science Museum
