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LicenseSounding quintant with 6-inch radius limb
Science Museum Group
© The Board of Trustees of the Science Museum
Sounding quintant with 6-inch radius limb, diamond-pattern anodized brass frame and silver inlaid scale marked -5° to 195° (169° range), 30 arc-min. divisions' with silver vernier scales to 1 arc-min. with wooden handle and Mahogany keystone box containing in the lid a label for Henry Porter (successor to William Cary), made by (William) Cary, London, 1855-1865. Fitted with tangent and clamping screws at back of the index arm; no shades; index-glass and horizon glass with screw and capstan screws adjustment; Detached telescope, (78 mm large objective) erect image with bracket without adjustment. Accessories include Screw-on diaphragm for the telescope; adjusting key; adjusting pin and magnifying glass (missing).
Details
- Category:
- Surveying
- Object Number:
- 1876-992
- Materials:
- steel (metal), brass (copper, zinc alloy), glass, ebony, mahogany (wood), felt, cotton (fibre), paper (fibre product) and iron
- Measurements:
-
overall: 125 mm x 323 mm x 247 mm, 2.38kg
- type:
- sounding quintant
- credit:
- Admiralty Hydrographic Department
