General Information

Serial #

5951

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

WOOD FRAME/ SYNTHETIC HANDLE, WATER RESERVOIR/ GLASS THERMOMETERS/ COTTON WICKS/ MERCURY/ LEATHER CASE WITH METAL PARTS

Dimensions

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

Length

22.8 cm

Width

16.5 cm

Height

3.5 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Forestry

Category

Silviculture

Sub-Category

N/A

Manufacturer

AKA

Casella

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Unknown

Period

Unknown

Canada

A BRITISH-MADE METEOROLOGICAL INSTRUMENT USED BY THE CANADIAN FORESTRY SERVICE TO MONITOR ATMOSPHERIC-CLIMATIC CONDITIONS.

Function

AN INSTRUMENT FOR DETERMINING ATMOSPHERIC HUMIDITY BY COMPARING THE DIFFERENT READINGS FROM TWO THERMOMETERS, ONE WITH A BULB KEPT WET. THE INSTRUMENT IS VENTILATED BY WHIRLING IT THROUGH THE AIR.

Technical

AN EXAMPLE OF A SIMPLE, PORTABLEHUMIDITY MEASURING INSTRUMENT. IT IS TYPICAL OF BRITISH (& CANADIAN) PSYCHROMETERS IN HAVING A RIGID HANDLE & HEAVY FRAME PROTECTING THE THERMOMETERS. THIS SPECIMEN HAS A WATER RESERVOIR BUILT INTO THE END OF THE FRAME, INTO WHICH THE WET BULB WICK DIPS, KEEPING IT CONTINUALLY MOISTENED.

Area Notes

Unknown

Details

Markings

BLACK STAMPED 'CASELLA/ LONDON' & 'MADE IN ENGLAND'/ THERMOMETERS BACKS MARKED 'Casella London' IN BLACK SCRIPT & '5921' OR '6029'; BLACK MARKINGS & SCALES ON FRONTS FOR 2O TO 120 F./ CASE STAMPED 'MADE IN ENGLAND'

Missing

N/A

Finish

VARNISHED WOOD/ BLACK SYNTHETIC/ WHITE COTTON/ CLEAR GLASS WITH WHITE BACKS/ METALLIC PARTS/ BROWN LEATHER

Decoration

N/A