General Information

Serial #

N/A

Part Number

1

Total Parts

32

AKA

N/A

Patents

N/A

General Description

BRASS, METAL, GLASS, WOOD/ CASE, WOOD, METAL, SYNTHETIC VELVET/ PTS, ACCESSORY CASES, WOOD, METAL, VELVET

Dimensions

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

Length

22.0 cm

Width

20.5 cm

Height

41.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Light & electromagnetic radiation

Sub-Category

N/A

Manufacturer

AKA

Seibert

Country

Federal Republic of Germany

State/Province

Unknown

City

Wetzlar

Context

Country

Canada

State/Province

Unknown

Period

POSSIBLY EARLY 1900'S. SEIBERT BRO'S SET UP CO. IN 1873 IN WETZLAR, GERMANY. (REF.1)

Canada

USED IN CANADIAN GEOLOGICAL SURVEY POSSIBLY DURING EARLY 1900'S BY DONORS HUSBAND. HE WAS A PHOTOGRAPHER & DEPARTMENT HEAD WITH GEOLOGICAL SURVEY.

Function

USED TO DETERMINE THE MINERAL COMPOSITION OF ROCKS BY STUDYING THEIR OPTICAL PROPERTIES. (REF.2 PG.1218)

Technical

AN IMPORTANT TOOL IN THE FIELD OF PETROGRAPHY. THE NICOL PRISM ANALYSER WAS USED TO STUDY THE OPTICAL PROPERTIES OF MINERALS IN ROCK. THIS HELPS TO DETERMINE THE COMPOSITION OF THE ROCK.

Area Notes

Unknown

Details

Markings

ETCHED AROUND EYEPIECE - SCALE FROM 0-360 DEGREES DIVIDED BY ONES/ ETCHED ON INNER BODY TUBE, SCALE 18-19/ SCALE ON LOWER BODY ETCHED 0-90/ ETCHED AT TOP OF ARM 'Seibert/ in/ Wetzlar'/ ETCHED ON FINE FOCUS KNOB '0.002mm'/ SCALE ETCHED AROUND ARM OF FINE FOCUS FROM 0-20

Missing

.1, STAGE, ORIGINAL BASE REPLACED WITH HOMEMADE WOOD BASE, PT MICROSCOPE CASE MISSING KEY From CA of 12/05/2001 by David Daley: Undetermined - unknown

Finish

BRASS BODY & FOCUS KNOBS, SILVER COLOURED METAL, WOOD BASE PAINTED BLACK, BRASS PTS, PAINTED BLACK/ PT, MICROSCOPE CASE, WOOD STAINED BROWN, FINISH WORN OFF DOOR INTERIOR HAS VELVET DYED DK BLUE, SYNTHETIC KNOB ON INTERIOR DRAWER - IVORY COLOURED, METAL HINGES, CARRYING HANDLE, LOCK MECHANISM, CHROME-LIKE FINISH./ PTS, ACCESSORY CASES, WOOD STAINED BROWN, INTERIOR LID LINED DK. BLUE VELVET, INSIDE KNOB OF ONE CASE BRASS COLOURED, METAL HINGES HAVE SURFACE WORN/ CORRODED OFF.

Decoration

N/A