Quintant with 3-inch radius limb, anodized brass frame and silver inlaid scale marked -5° to 165° (144° range), 20 arc-min. divisions' with silver vernier scales to 30 arc-sec. and hinged wooden handle, without box, by (William) Cary, London, 1850-1860. Fitted with tangent and clamping screws at back of the index arm; two shades (both green); two horizon shades (both green); index-glass and horizon glass with screw adjustment; Magnifier (single lens) on 45 mm swivelling arm and Threaded telescope bracket with two telescopes, (70 mm) erect image, (105 mm) inverted image and sight tube (69 mm).
Details
- Category:
- Surveying
- Object Number:
- 1876-991
- Materials:
- mahogany (wood), ebony, steel (metal) and brass (copper, zinc alloy)
- Measurements:
-
overall: 150 mm x 135 mm x 160 mm, .625kg
- type:
- quintant
- credit:
- Admiralty Hydrographic Department
