General Information

Serial #

1093

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

CAST IRON BASE & CASING END/ METAL CASING COVER WITH GLASS WINDOW/ METAL PARTS.

Dimensions

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

Length

34.2 cm

Width

14.0 cm

Height

18.7 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Meteorology

Category

Atmospheric temperature measurement

Sub-Category

N/A

Manufacturer

AKA

FRIEZ

Country

United States of America

State/Province

Maryland

City

Baltimore

Context

Country

Canada

State/Province

Unknown

Period

Unknown

Canada

BOURDON TUBE THERMOGRAPHS OF UNKNOWN MANUFACTURE WERE USED BY THE CANADIAN METEOROLOGICAL SERVICE IN ADDITION TO BIMETAL THERMOGRAPHS C. 1930. THIS EXAMPLE CLOSELY RESEMBLES THE FRIEZ SHORT RANGE U.S.. WEATHER BUREAU THERMOGRAPH WHICH APPEARED IN FRIEZ' 1924 CATALOGUE.

Function

AN INSTRUMENT THAT MEASURES AND RECORDS ATMOSPHERIC TEMPERATURE BY MEANS OF THE EXPANSION AND CONTRACTION OF LIQUID IN A METAL TUBE.

Technical

A DEFORMATION & LIQUID-IN-METAL INSTRUMENT ACTUATED BY A CHANGE IN VOLUME OFA LIQUID IN A METAL TUBE; IT IS THE RESULTING DEFORMATION OF THE TUBE THAT IS MEASURED. A BOURDON TUBE IS A HOLLOW FLEXIBLE METAL TUBE, CURVED & COMPLETELY FILLED WITH A FLUID, SUCH AS ALCOHOL.

Area Notes

Unknown

Details

Markings

EXTERIOR PLATE READING 'THERMOGRAPH/NO. 1093/JULIEN P. FRIEZ & SONS/ BALTIMORE, MD. U.S.A.'/ CAST LETTERING ON UNDERSIDE READING 'JULIEN P. FRIEZ/ BELFORT OBSERVATORY/BALTIMORE M.D. U.S.A.'

Missing

CLOCK & DRUM NOT ORIGINAL. From CA of 10/27/1993 by Tony Missio: Yes - missing axle for drum

Finish

BLACK WRINKLE FINISHED CASING/ BLACK ENAMELED BOURDON TUBE PROTECTOR/ BRASS COLOURED BOURDON TUBE AND PARTS/ COPPER COLOURED NEEDLE/ GOLD PAINTED HARDWARE.

Decoration

N/A