General Information

Serial #

C433

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

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

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

99.2 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

Unknown

Period

Unknown

Canada

BRITISH MADE BAROMETER OF TYPE USED BY CANADIAN METEOROLOGICAL SERVICE IN LATE 19TH CENTURY.

Function

AN INSTRUMENT THAT MEASURES ATMOSPHERIC HUMIDITY THROUGH ITS EFFECT ON A COLUMN OF MERCURY.

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 TO ADJUST 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' & on base 'C/433'/incised black markings on scale& vernier for 24 to 32 inches/thermometer marked for 0 to 130 F.

Missing

MERCURY?

Finish

BLACK ENAMEL PAINTED CASING & THERMOMETER CASING/ BRASS COLOURED TUBE/ CLEAR, COLOURLESS GLASS WITH WHITE-BACKED THERMOMETER

Decoration

N/A