General Information

Serial #

21264

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Brass/ Wooden case with brass fittings and locks, and leather handles.

Dimensions

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

Length

48.3 cm

Width

22.9 cm

Height

15.2 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Exploration and Survey

Category

Measurement-direction

Sub-Category

N/A

Manufacturer

AKA

Gurley

Country

United States of America

State/Province

New York

City

Troy

Context

Country

Unknown

State/Province

Unknown

Period

Unknown

Canada

Used by Canadian Topographical Survey.

Function

Allows the operator to sight a distant object and use the line of sight to either draw a line in the direction of the object or to measure the angle to the object from a specific point of reference. This device is usually used in conjunction with a plane table and is used to plot a point on a map or to create a map.

Technical

Sophisticated 19th century survey equipment used with a plane table to lay out plans for farms, town lots etc. The design allowed rapid and reasonably accurate surveys to be performed.

Area Notes

Unknown

Details

Markings

Mfr. Information: 'Beaman Stadia Arc No.3047/ Patented Mar. 27, 1906/ W.& L.E. Gurley, Troy, N.Y.' ; 'W. & L.E. GURLEY/ TROY, N.Y./ 21264' Bears mark: 'T.S. 1478'

Missing

None apparent

Finish

Operable. Black paint once covered the brass, but most has been worn off.

Decoration

N/A