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LicenseGunner's callipers; brass with iron tips
Science Museum Group
© The Board of Trustees of the Science Museum
Gunner's callipers; brass with iron tips, for measuring external and internal diameters from3/4" to 7 1/2"; inscribed: Dominucus Lusuerg, late 17th or early 18th century
This instrument is for measuring the bore of cannons and the diameter of cannon ballsis inscribed with the name 'Dominicus Lusuerg' who lived in Rome from 1694 to 1744. it is made of brass. The scale graduations are proportional to the cubes of the diameters so that direct reading of the weights of the balls measured are obtained. the word ferro on the scale indicates that it was intended for measuring cannon balls of iron.
Details
- Category:
- Hand and Machine Tools
- Object Number:
- 1952-238
- Materials:
- brass & iron
- Measurements:
-
Closed: 310 mm x 205 mm x 15 mm, 0.2 kg
- type:
- gunner's calipers
- credit:
- Backer, H.E.
