General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

BRASS CASING & TUBE/ GLASS TUBES & CYLINDER/ IVORY POINT/ WOOD & LEATHER CISTERN/ METAL PARTS/ MERCURY

Dimensions

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

Length

N/A

Width

6.2 cm

Height

101.0 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

Negretti Zambra

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Ontario

Period

TURN OF 20TH CENTURY

Canada

BRITISH MADE INSTRUMENT USED BY STANDARDS BRANCH OF CANADIAN GOVERNMENT DEPT. OF TRADE & COMMERCE.

Function

INSTRUMENT THAT MEASURES ATMOSPHERIC HUMIDITY THROUGH ITS EFFECT ON COLUMN OF MERCURY IN GLASS.

Technical

LARGE FORTIN TYPE BAROMETER WITH ADJUSTABLE BOXWOOD, LEATHER CISTERN, IVORY POINT, & GLASS CYLINDER; SCREW IN BASE ALLOWS LEATHER BAG TO BE RAISED UNTIL MERCURY TOUCHES FIDUCIAL POINT. INVENTED C. 1800 BY FORTIN, THIS INSTRUMENT IS MORE COMPLEX TOADJUST BUT EASIER TO TRANSPORT THAN FIXED CISTERN TYPE.

Area Notes

Unknown

Details

Markings

INCISED LETTERING ON TUBE READING "NEGRETTI & ZAMBRA/ Instrument Makers to Her Majesty/ LONDON"/ INCISED BLACK MARKINGS ON SCALE & VERNIER FOR 24 TO 32 INCHES/ THERMOMETER MARKED FOR 0 TO 130 F.

Missing

APPEARS COMPLETE From CA of 05/05/2004 by Sue Warren: Yes - missing mercury

Finish

BLACK PAINTED BASE/ BRIGHT BRASS COLOURED COATED TUBE CASING & PARTS/ METALLIC GREY THERMOMETER CASING & BAROMETER SCALE/ CLEAR, COLOURLESS GLASS WITH WHITE-BACKED THERMOMETER

Decoration

N/A