Semi Circumferenter by John Potter: A semi-circular instrument with a curved scale marked with numbers from 0 to 90 on both sides, divided into increments of 10. The scale is engraved with a line down the center. A circular gear is at the center of the curved scale where a vertical line extends down to the base. Two black pieces are on either end of the instrument, with a metal piece on each. A rectangular base has two circular indentations and a sliding piece with a diagonal line through a circle. The instrument has engraved text that reads "Potter" and "Broadhead".
Artwork details
- Date:
- ca. 1790
- Medium:
- Brass, cherry, white pine
- Culture:
- American
- Dimensions:
- 600 × 472 px
- Museum record:
- View original
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