General Information

Serial #

11421

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

GLASS/ MERCURY

Dimensions

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

Length

26.9 cm

Width

1.0 cm

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

Negretti Zambra

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Unknown

Period

Unknown

Canada

FROM THERMOMETER COLLECTION OF R.C. JACOBSEN OF MSC (C. 1931- 1951). HE TOOK PART INCANADIAN 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 USED TO MEASURE TEMPERATURE BY MEANS OF ITS EFFECT ON COLUMN OF MERCURY IN GLASS.

Technical

ACCORDING TO BRITISH MET. OFFICE MANUAL, SOLID STEM THERMOMETERS WERE ATTACHED TO PORCELAIN & OTHER MOUNTS FOR EXTRA STRENGTH & ROBUSTNESS, HAVING ENDS FORMED INTO NIB OR HOOK FOR ATTACHMENT TO MOUNT. IN BRITAIN SUCH THERMOMETERS WERE USED IN SCREENS ABOARD SHIP & FOR MEASURING SEA TEMPERATURES. IT SEEMS THAT THIS THERMOMETER PREDATES 1890. THE N&Z THERMOMETERS RECEIVED BY THE METEOROLOGICAL SERVICE OF CANADA BETWEEN 1890 AND 1903 HAD SERIAL NUMBERS FROM 69125 TO 106909. THERE WERE FOURTEEN SHIPMENTS WHICH TOTALED 729 THERMOMETERS. ENGLISH THERMOMETERS SHIPPED FROM 1885 TO 1889 WERE NUMBERED 865 TO 1174 BUT THE MANUFACTURER WAS NOT IDENTIFIED (REF. 4).

Area Notes

Unknown

Details

Markings

INCISED BLACK LETTERING READING "NPL 24" & "11421"/ INCISED BLACK SCALE MARKINGS

Missing

POSSIBLY SCALE UPON WHICH IT WOULD BE MOUNTED

Finish

COLOURLESS TRANSPARENT THERMOMETER WITH WHITE BACK/ METALLIC BULB

Decoration

N/A