General Information

Serial #

N/A

Part Number

1

Total Parts

3

AKA

N/A

Patents

N/A

General Description

non-ferrous metal frame and handle/ glass tubes/ fabric wick/ mercury

Dimensions

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

Length

37.0 cm

Width

2.0 cm

Height

1.3 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

Bennett Wright

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Unknown

Period

Unknown

Canada

Part of a large collection of meteorological instruments acquired from the Meteorological Service of Canada (previously Atmospheric Environment Service) by the CSTM since 1967. MSC is the government agency responsible for collecting and disseminating meteorological data and forecasts in Canada. It was founded in 1871 in Toronto where it is still headquartered. The MSC was originally on the University of Toronto downtown campus but moved to Downsview in 1971 on land owned by UofT. The headquarters houses laboratories, research facilities and calibration and instrument maintenance facilities (now largely contracted out).

Function

An instrument for determining atmospheric humidity by comparing the different readings from two thermometers, one with a bulb kept wet and ventilated.

Technical

An example of a sling psychrometer, the frame made by Bennett and Wright Ltd. (address unknown) and the thermometers by Johnson Service Co. (USA?). The wet and dry bulb thermometers are not placed inside a frame but are mounted staggered on either side of a metal bar. The pivoted handle is rigid.

Area Notes

Unknown

Details

Markings

Incised lettering on back of frame reads 'BENNETT & WRIGHT LIMITED'/ black lettering on thermometers reads 'JOHNSON/ SERVICE CO.' with scale markings and numbers for 30 to 110 F.

Missing

ring at end of one thermometer tube broken off

Finish

colourless glass tubes with white backs and red band/ plated metal/ white wick

Decoration

N/A