octant
Datecirca 1840
Inventory Number5249
ClassificationOctant
Subject
Maker
Charles Gedney King
1808 - 1858
Cultural Region
Place of Origin
Dimensions5.5 x 21.5 x 18 cm (2 3/16 x 8 7/16 x 7 1/16 in.)
Box: 7.8 × 23.2 × 21 cm (3 1/16 × 9 1/8 × 8 1/4 in.)
blue board box: 8.9 × 40.6 × 28.6 cm (3 1/2 × 16 × 11 1/4 in.)
Box: 7.8 × 23.2 × 21 cm (3 1/16 × 9 1/8 × 8 1/4 in.)
blue board box: 8.9 × 40.6 × 28.6 cm (3 1/2 × 16 × 11 1/4 in.)
Material
Accessorieskeystone mahogany box
DescriptionThis is an all-brass reflecting octant with an index arm decorated with a scrolling circular pattern, floral design, and punch marks inscribed around the edges. It has a rotating magnifier [glass missing] for the vernier scale, a thumb screw clamp, and an adjustable index mirror with three glass shades and an adjustable horizon glass operated by a moveable disc and shifting plate underneath the frame. The back sight has two peep holes with a pivoted peep hole cover.
It has a 6.75" radius, 3 index shades, 0 to 20 vernier to 1' (0 right), -5° to 105° scale.
It comes with a mahogany keystone case.
It has a 6.75" radius, 3 index shades, 0 to 20 vernier to 1' (0 right), -5° to 105° scale.
It comes with a mahogany keystone case.
Signedon trade card in case: C. G. King Importer and Manufacturer of Mathematical, Nautical, Surveying, and Engineering Instruments Nautical, Books, Charts, &c. No. 7 Broad St. (3d. Store from State St.) Boston
ProvenanceDavid Wheatland purchased from Margaret Zervas, Long Island, NY, October 25, 1966, at the Ellis Memorial Antiques Show in Boston. Donated to CHSI April 1977.
Historical AttributesFormerly DW244
E. & G. W. Blunt
Date: 1825-1860
Accessories: Keystone box (1996-1-0172b).
Object number: 1996-1-0172a
Spencer, Browning, & Company
Date: 1843-1850
Accessories: box with key, adjustment tool, telescope, eye tube, eyepiece shade
Object number: 5248
Joseph Sewill
Date: circa 1850
Accessories: Keystone mahogany box, sight tube, adjustment tool, (telescope missing)
Object number: 5334
Henry Duren
Date: 1852-1861
Accessories: keystone box (mahogany?), second telescope (3.25") in box
Object number: 5306
See also/See also
