Protractor case
Case for protractor, semi-circular, by Jones
- Materials:
- mahogany
- Object Number:
- 1911-246 Pt1
- type:
- instrument case
- Image ©
- The Board of Trustees of the Science Museum
Protractor, semi-circular, by Jones
- Made:
- London
Protractor, semi-circular, by Jones, 6" circle, divided on brass, numbered both ways from 0 degrees to 180 degrees, subdivided to 1/2 degrees, reading by vernier to 1 minute; arm projects about 3" beyondcircle, mahogany case 10" x 4 3/4" x 3/4", marked "H.O.R."
Details
- Category:
- Mathematics
- Object Number:
- 1911-246
- type:
- drawing instruments and semi-circular protractors
- credit:
- British Admiralty (Hydrographic Department)
Parts
Protractor, semi-circular
Protractor, semi-circular, by Jones, 6" circle, divided on brass, numbered both ways from 0 degrees to 180 degrees, subdivided to 1/2 degrees, reading by vernier to 1 minute; arm projects about 3-inch beyond circle.
- Measurements:
-
overall: 7 mm x 155 mm x 180 mm, 0.188 kg
- Materials:
- copper (metal) , brass (copper, zinc alloy) , steel (metal) and glass
- Object Number:
- 1911-246 Pt2
- type:
- drawing instruments and semi-circular protractors
- Image ©
- The Board of Trustees of the Science Museum
