General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

WOOD BOX WITH LOUVRED SIDES & DOOR/ DOUBLE HEAT SHIELD ON TOP MADE OF ASBESTOS EMBEDDED IN PLASTER (?)/ METAL HARDWARE

Dimensions

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

Length

73.7 cm

Width

52.2 cm

Height

68.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Meteorology

Category

Atmospheric humidity measurement

Sub-Category

N/A

Manufacturer

AKA

Environment CA

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Unknown

Period

1950'S +

Canada

THE 2ND CANADIAN METEOROLOGICAL SERVICE VERSION OF THE STEVENSON SCREEN. A TYPE OF LOUVRED SCREEN WAS USED AT THE TORONTO OBSERVATORY FROM ITS FOUNDING IN 1839; IN THE 1870'S KINGSTON DEVELOPED ANOTHERFORM OF SCREEN THAT WAS STILL IN USE IN THE 1890'S. THIS SCREEN IS AN EXAMPLE OF THE MODERN SUCCESSOR TO THESE.

Function

A BOX WITH DOUBLE ROOF FOR PROTECTION FROM SUN & DOUBLE LOUVRED SIDES FOR VENTILATION, USED OUTDOORS TO CONTAIN METEOROLOGICAL INSTRUMENTS (MAINLY THERMOMETERS) IN ORDER TO PROTECT THEM FROM SOLAR RADIATION, THERMAL REFLEC- TION, PRECIPITATION ETC. & OBTAIN MORE ACCURATE MEASUREMENTS OF AIR TEMPERA- TURE, ETC.

Technical

THE STEVENSON SCREEN WITH DOUBLE LOUVRED SIDES APPEARED IN 1864; THE LARGER WHITE PAINTED VERSION WITH A DOUBLE ROOF & STAGGERED FLOOR BOARDS WAS ADOPTED BY THE R.M.S. IN 1874. THE M.S.C. SCREEN OF THE 1920'S TO 1940'S IS OF THIS TYPE; IN THE EARLY 1950'S THE M.S.C. TYPE B WITH AN ASBESTOS ROOF WAS DEVELOPED.

Area Notes

Unknown

Details

Markings

N/A

Missing

APPEARS COMPLETE

Finish

BOX PAINTED WHITE/ GREY SHIELDS/ BLACK COLOURED HARDWARE

Decoration

N/A