General Information

Serial #

N/A

Part Number

1

Total Parts

14

AKA

N/A

Patents

N/A

General Description

BRASS & BELL-METAL CONSTRUCTION; CIRCLES, VERNIERS & MICROMETER SCREW SCALES DIVIDED ON PLATINUM; NICKEL (?) PLATING ON LEVELLING SCREWS; GLASS OPTICS/ WOODEN KNOB ON STRIDING LEVEL/ LEATHER COVER ON WOOD CASE

Dimensions

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

Length

39.4 cm

Width

29.0 cm

Height

45.0 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

C.1912-1925

Canada

THEODOLITE DESIGNED BY DR. E. DEVILLE, SURVEYOR GENERAL OF CANADA 1885-1924. USED ON BLOCK SURVEYS PERFORMED BY TOPOGRAPHICAL SURVEYSBRANCH C.1912-1925.

Function

TO DETERMINE LATITUDE, USING TALCOTT SYSTEM. USED GENERALLY TO MEASURE VERTICAL & HORIZONTAL ANGLES.

Technical

PRECISION THEODOLITE, DESIGNED FOR AND PROBABLY USED IN GEODETIC SURVEYING, LIKELY IN ESTABLISHING BASE LINES.

Area Notes

Unknown

Details

Markings

'TROUGHTON & SIMMS/ LONDON' ON PLATE/ '112' ON TELESCOPE BODY TUBE & STRIDING LEVEL CASING/ 'T.S. 1049' INCISED IN LEATHER COVERING ON CASE & ON SPARE EYEPIECE DIAPHRAGM/ '112' & 'NO.3' HANDWRITTEN IN PENCIL INSIDE CASE/ HUGHES-OWENS REPAIR LABEL INSIDE CASE/ DEPT. OF THE INTERIOR-TOPOGRAPHICAL SURVEY OF CANADA-PHYSICAL TESTING LABORATORY CARD FOR BASE LINE TRANSIT 1049 112 - DATED DEC. 21 (19)25, 22-4-26.- INSIDE CASE/ CARD INSIDE LID ' 'DEPARTMENT OF THE INTERIOR, TOPOGRAPHICAL SURVEYS BRANCH/ Block Survey transit Troughton & Simms micrometer #112/ One division of striding level [?]"at 44degrees Fahr. (Length of bubble 20 div.)/ T.S. Branch Label: "...One division of latitude level = [?illegible] at 47 Fahr. (Length of bubble 20 div.)/ One div. of spare striding level = [blank]/ One division of plate level = [blank]/ One turn filar micrometer = 1.66"398 at stellar focus at 60 Fahr./ WIRE 1 2 3 4 5/ Equatorial Intervals, Circle West, Drum West,/ DATE 25/3/12'.

Missing

MISSING SCREW TO ATTACH KNOB TO MICROMETER EYEPIECE. ELECTRICAL LAMP FITTING, INCLUDING BULB, MOUNTED ON BRACKET MAY NOT BE ORIGINAL TO THIS THEODOLITE.

Finish

ANODIZED GREEN FINISH ON TELESCOPE BODY TUBE, PLATE & LIMB, & STRIDING LEVEL/ STANDARDS, LEVELLING SCREW FRAME & SELECTED FITTINGS HAVE ANODIZED BLACK FINISH/ BRIGHT LACQUERED BRASS MICROMETER EYEPIECES & SOME FITTINGS/ LEVELLING FEET HAVE NICKEL-PLATED FINISH/ LIGHT BROWN LEATHER COVER ON WOOD CASE

Decoration

N/A