General Information

Serial #

855

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

NON-FERROUS METAL (BRASS?) CASING/ BEVELED GLASS DIAL COVER/ METAL WORKINGPARTS

Dimensions

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

Length

7.2 cm

Width

5.1 cm

Height

1.7 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Meteorology

Category

Atmospheric pressure measurement

Sub-Category

N/A

Manufacturer

AKA

Cary

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Unknown

Period

Unknown

Canada

A BRITISH MADE BAROMETER USED BY THE GEOLOGICAL SURVEY OF CANADA. IT IS PART OF A COLLECTION OF HISTORICAL SURVEYING INSTRUMENTS ACQUIRED BY NRC IN THE 1930'S

Function

AN INSTROMENT THAT MEASURES ATMOSPHERIC PRESSURE THROUGH ITS EFFECT ON AN ANEROID, OR METAL CHAMBER PARTIALLY EXHAUSTED OF AIR. THIS IS AN ALTITUDE BAROMETER, USED IN SURVEYING TO MEASURE ELEVATIONS

Technical

AN EXAMPLE OF A SMALL POCKET WATCH FORM ANEROID BAROMETER, A TYPE MADE BY SEVERAL MANUFACTUERERS. FROM AROUND 1870 BAROMETERS WERE MADE SPECIFICALLY FOR SURVEYORS & MINING ENGINEERS SO THAT THEY COULD ASCERTAIN WITHOUT CALCULATION, THE HEIGHT OF MOUNTAINS & DEPTH OF MINES

Area Notes

Unknown

Details

Markings

BLACK LETTERING ON DIAL FACE READING: `CARY/ 181.Strand/ LONDON/ 835/ Compensated' & SCALE MARKINGS FOR 29 TO 31 INCHES & 0 TO 10,000 FT./ INCISED LETTERING ON BACK READING `G.S.C./ NO.20'

Missing

N/A

Finish

PLATED CASING/ COLOURLESS TRANSPARENT GLASS/ WHITE DIAL FACE/ BLACK INDICATOR NEEDLE

Decoration

N/A