Semicircular brass protractor by William Wilton, in original mahogany case; circle about 4 3/8" radius, divided in half degrees and reading by vernier to one minute of arc ( portion of lid (of case) broken at one hinge)
Details
- Category:
- Mathematics
- Object Number:
- 1923-287
- Materials:
- brass
- type:
- drawing instrument and semi-circular protractor
- credit:
- Poulter, H.W.
Parts
Semicircular brass protractor by William Wilton
- Materials:
- brass (copper, zinc alloy)
- Object Number:
- 1923-287 Pt2
- type:
- drawing instruments and semi-circular protractors
