Calipers for artillery measurement, with many formulae engraved on them. Engraving by A. Bell.
- Date:
- [date of publication not identified]
- Reference:
- 47030i
Licence: Public Domain Mark
Credit: Calipers for artillery measurement, with many formulae engraved on them. Engraving by A. Bell. Wellcome Collection. Source: Wellcome Collection.
