General Information

Serial #

N/A

Part Number

1

Total Parts

10

AKA

N/A

Patents

N/A

General Description

METALS, INCLUDING ALUMINUM AND SILVER (ARC); GLASS OPTICS..10 LEATHER CASE HAS CHAMOIS LINING; BRASS BUCKLE CLOSURE

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

15.0 cm

Width

7.7 cm

Height

4.3 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Exploration and Survey

Category

Measurement-angles

Sub-Category

N/A

Manufacturer

AKA

Stanley

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Unknown

Period

THIS SEXTANT PRESUMABLY USED IN EARLY 20TH C.

Canada

BOX SEXTANT WAS AMONG SURVEY INSTRUMENTS COLLECTED BY MR. LOU SEBERT, A TOPOGRAPHICAL SURVEYOR AND MAPPER WHO WORKED FOR THE CANADIAN ARMY'S SURVEY AND MAPPING DIVISION, AND CLOSELY WITH THE STAFF OF THE TOPOGRAPHICAL SURVEY OF CANADA. HE AUTHORED MANY PAPERS AND WAS CO-EDITOR OF 'MAPPING ANORTHERN LAND'(1999).

Function

USED TO MEASURE VERTICAL AND/OR HORIZONTAL ANGLES BETWEEN OBJECTS, ESPECIALLY CELESTIAL OBJECTS IN RELATION TO THE HORIZON.

Technical

POCKET OR BOX SEXTANT IN WHICH OPTICAL COMPONENTS OF SEXTANT ARE HOUSED INSIDE CYLINDRICAL BRASS BOX, AND INDEX ARM AND DIVIDED ARC ARE ON TOP/OUTSIDE. THIS EXAMPLE IS UNUSUAL BECAUSE IT IS MADE OF ALUMINUM. POPULAR AS BOTH A CIVILIAN LAND & MILITARY SURVEY INSTRUMENT. (REF. 2)

Area Notes

Unknown

Details

Markings

.1 "Stanley, London" marked on instrument face, above scale. Scale divided -0 to 140+; labelled at intervals of 10. Scale on vernier arm divided [0] to 30; labelled at intervals of 10. "HYDROGRAPHIC SURVEY/ 1" incised on.2 cover top; crudely incised markings on inside of cover are illegible. "2" crudely incised into one side panel of.10 case.

Missing

INSTRUMENT APPEARS COMPLETE. .10 CASE COVER MISSING ONE SIDE SECTION.

Finish

DULL SILVER METAL FINISH ON MOST EXTERNAL AREAS OF INSTRUMENT, INCLUDING COVER. INTERIOR OF INSTRUMENT, AND TELESCOPE LENS HOUSINGS ARE FLAT BLACK. PALE, DULL GOLD-COLOUR FINISH ON TELESCOPE BODY TUBE..10 CASE IS DARK BROWN; CREAM-COLOUR CHAMOIS LINING ON MOST INTERNAL SURFACES.

Decoration

N/A