Johnson's 'Volutor'
- maker:
- Hoffmann, F.
Johnson's "Volutor"; made by T. Hoffmann
Details
- Category:
- Mathematics
- Object Number:
- 1910-165
- Materials:
- brass (copper, zinc alloy), thread and metal (unknown)
- Measurements:
-
overall: 1.04 kg
overall (volutor): 300 mm x 270 mm x 180 mm,
- type:
- curve drawing instruments and volutors
- credit:
- J.C. Stevens Auction House
