General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

GLASS INNER & OUTER TUBES/ METAL PARTS/ CARDBOARD BOX

Dimensions

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

Length

44.0 cm

Width

9.4 cm

Height

8.8 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Forestry

Category

Silviculture

Sub-Category

N/A

Manufacturer

AKA

Negretti Zambra

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Unknown

Period

Unknown

Canada

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

Function

AN INSTRUMENT THAT MEASURES THE RADIANT HEAT OF THE SUN, REGISTERING THE HIGHEST OR MAXIMUM TEMPERATURE BY MEANS OF A COLUMN OF MERCURY, THE TOP OF WHICH REMAINS FIXED AT THE HIGHEST POINT THE MERCURY REACHES.

Technical

SIMILAR TO A THERMOMETER MARKETED IN THE LATE 1930'S BY N & Z FOR USEIN A MARIE DAVY TYPE ACTINOMETER. THIS CONSISTS OF TWO THERMOMETERS MOUNTED IN HERMETICALLY SEALED SHEATHS, ONE BRIGHT & THE OTHER BLACKENED, MOUNTED IN A WOOD BASE. IT ASCERTAINS APPROXIMATELY THE QUANITY OF HEAT RECEIVED BY THE EARTH FROM THE SUN.

Area Notes

Unknown

Details

Markings

BLACK LETTERING ON INNER TUBE BACK READING 'MADE IN ENGLAND', 'NEGRETTI & ZAMBRA LONDON EC-1994', 'MAXIMUM'/ FRONT SCALED IN BLACK FOR +20 TO +200 F./ BOX MARKED IN HANDWRITTEN RED 'THERMOMETER/ SOLAR RADIATION', & IN BLUE PEN 'PA63A'

Missing

N/A

Finish

COLOURLESS TRANSPARENT GLASS/ WHITE BACKED INNER TUBE WITH BLACK BULB & END OF STEM/ NATURAL CARDBOARD

Decoration

N/A