General Information

Serial #

62086 (LENS)

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

METAL & GLASS CONSTRUCTION, CW WOOD & METAL TRIPOD & CASE.

Dimensions

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

Length

20.0 cm

Width

N/A

Height

20.3 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

Troughton Simms

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Unknown

Period

THIS INSTRUMENT PROBABLY USED C. 1905 TO 1930S, AND POSSIBLY LATER.

Canada

"SURVEYOR GENERAL" PATTERN INSTRUMENT, USED ON DOMINION LAND SURVEYS. IT MAY HAVE BEEN DESIGNED/MODIFIED SPECIFICALLY FOR USE ON DOMINION LAND SURVEYS IN PRAIRIE PROVINCES.

Function

USED TO MEASURE VERTICAL & HORIZONTAL ANGLES.

Technical

STANDARD TROUGHTON & SIMMS INSTRUMENT MODIFIED BY ADDITION (REPLACEMENT ?) OF STEINHEIL OBJECTIVE LENS. FITTED WITH HORIZONTAL & VERTICAL CIRCLES; 1 VERNIER ON VERTICAL CIRCLE; 2 VERNIERS ON HORIZONTAL CIRCLE. TRANSITS AT EYEPIECE END ONLY. OPTICAL QUALITY OF INVERTEDIMAGE & PRECISION OF FOCAL POINT ARE EXCEPTIONAL.

Area Notes

Unknown

Details

Markings

" Troughton & Simms London England" incised on instrument; also "T.S. 2858" & "342". "G.S.C. 28.1" incised on tripod fitting; "G.S.C. 3" incised on underside of tripod fitting. "Steinheil Munich Germany" insiced on lens. "DOM OBS 342" incised on case. / For other markings, see documentation in supp. info. file.

Missing

ORIGINAL OPTICS (OBJECTIVE LENS) AND TRIPOD HEAD FITTING.

Finish

Unknown

Decoration

N/A