Thermometer

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Ingenium, 1987.0719.001
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OBJECT TYPE
MERCURY-THALLIUM/FAHREN/MOUNTED
DATE
1950
ARTIFACT NUMBER
1987.0719.001
MANUFACTURER
H-B INSTRUMENT CO.
MODEL
22420-C
LOCATION
Philadelphia, Pennsylvania, United States of America

More Information


General Information

Serial #
T718862
Part Number
1
Total Parts
1
AKA
N/A
Patents
N/A
General Description
BAKELITE AND BRASS HOLDER/ GLASS THERMOMETER TUBE/ MERCURY?

Dimensions

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

Length
33.1 cm
Width
4.6 cm
Height
2.6 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
HB
Country
United States of America
State/Province
Pennsylvania
City
Philadelphia

Context

Country
Canada
State/Province
Unknown
Period
+/- 1952
Canada
AN AMERICAN MADE THERMOMETER IN A CANADIAN METEOROLOGICAL SERVICE HOLDER, THE LATTER MARKED DOT METEOROLOGICAL DIVISION, INDICATING IT WAS MADE BETWEEN 1936 & 1956.
Function
AN INSTRUMENT THAT MEASURES LOW AIR TEMPERATURES BY MEANS OF THE EFFECT OF TEMPERATURE ON A COLUMN OF MERCURY-IN-GLASS. THE MERCURY CONTAINS THALLIUM WHICH LOWERS ITS FREEZING POINT FOR USE AT VERY LOW TEMPERATURES.
Technical
A MERCURY-THALLIUMTHERMOMETER FOR LOW TEMPERATURES, IN A CANADIAN METEOROLOGICAL SERVICE HOLDER, BOTH OF THE TYPE ILLUSTRATED IN THE 1952 M.S.C. MANUAL (REF. 1). THE CANADIAN SERVICE BEGAN USING MERCURY-THALLIUM IN 1948-1949; IT FREEZES AT -78 DEGREES F. WHILE MERCURY DOES SO AT -38 DEGREES F.
Area Notes
Unknown

Details

Markings
Black lettering on thermometer back reading 'MERCURY THALLIUM FILLED CAT.NO. 224020-C HB T718862 USA' & on front for -70 to +70 F./white markings on bakelite for -70 to +70 F. and reading 'CANADA, DEPT. OF TRANSPORT/ METEOROLOGICAL DIVISION' and gold lettering reading 'NO. T-718862'.
Missing
From CA of 12/30/1993 by Tony Missio: No - Complete
Finish
BLACK BAKELITE WITH BRASS COLOURED PARTS/ CLEAR, COLOURLESS TUBE WITH YELLOW BACK/ METALLIC BULB
Decoration
N/A

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

H-B INSTRUMENT CO., Thermometer, circa 1950, Artifact no. 1987.0719, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1987.0719.001/

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