General Information

Serial #

T54139

Part Number

2

Total Parts

2

AKA

N/A

Patents

N/A

General Description

GLASS THERMOMETER TUBE/ MERCURY CONTAINING THALLIUM

Dimensions

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

Length

34.4 cm

Width

N/A

Height

N/A

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

HB

Country

United States of America

State/Province

Pennsylvania

City

Philadelphia

Context

Country

Canada

State/Province

Unknown

Period

Unknown

Canada

FROM THERMOMETER COLLECTION OF R.C. JACOBSEN OF MSC (C. 1931- 1951). HE TOOK PART IN CANADIAN INTERNATIONAL POLAR YEAR EXPEDITION TO COPPERMINE, NWT (1932);WAS INVOLVED IN DESIGN OF MSC RADIOSONDE IN 1930'S; DESIGNED METEO INSTRUMENTS FOR AIRCRAFT WHICH HE USED TO MAKE OBSERVATIONS OVER LAKE ONTARIO IN HIS OWN PLANE.

Function

INSTRUMENT THAT MEASURES MAXIMUM AIR TEMPERATURES BY MEANS OF COLUMN OF MERCURY-IN-GLASS, TOP OF WHICH REMAINS FIXED AT HIGHEST POINT THAT COLUMN REACHES. IT WAS USED IN LOW TEMPERATURE SITUATIONS: MERCURY CONTAINS THALLIUM, WHICH LOWERS ITS FREEZING POINT FOR USE AT VERY LOW TEMPERATURES.

Technical

AMERICAN MADE MERCURY-THALLIUM THERMOMETER FOR LOW TEMPERATURES. MERCURY-THALLIUM FREEZES AT -78 DEGREES F. WHILE MERCURY DOES SO AT -38 DEGREES F. CANADIAN METEOROLOGICAL SERICE BEGAN USING MERCURY-THALLIUM THERMOMETERS IN 1948-1949.

Area Notes

Unknown

Details

Markings

INCISED BLACK LETTERING ON BACK READING "MERCURY-THALLIUM FILLED" WITH MFR.'S LOGO & "T54139" / INCISED BLACK SCALE MARKINGS FOR -75 TO +110 F. ON FRONT

Missing

COMPLETE

Finish

COLOURLESS TRANSPARENT TUBE WITH WHITE BACK/ METALLIC BULB WITH WHITE BACK

Decoration

N/A