Reduction plate by Jones, engraved "Thomas Jones 62 Charing Cross, London", outside dimensions of brass frame are 8 3/8" x 6 3/16" and nearly 1/4" thick, glass has cross lines on under surface 7" x 5", each inch divided into 12 parts, mahogany box 9" x 6 3/4" x 7/8" with Jones's card inside
Details
- Category:
- Mathematics
- Object Number:
- 1911-374
- Materials:
- brass
- Measurements:
-
overall: 16 x 210 x 155 mm
- type:
- reduction plate
- credit:
- British Admiralty (Hydrographic Department)