Reduction plate by Jones, with case.

Made:
1816-1850 in Charing Cross
maker:
Thomas Jones

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)

Parts

Reduction plate by Jones

Reduction plate by Jones

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.

Measurements:
overall: 16 mm x 210 mm x 155 mm, 0.642 kg
Materials:
brass , glass and paper
Object Number:
1911-374 Pt2
type:
reduction plate