General Information

Serial #

N/A

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

WOOD BASE/ METAL FEET & WORKING PARTS/ PAPER SCALE/ FABRIC GASKET

Dimensions

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

Length

20.3 cm

Width

19.0 cm

Height

18.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Demonstration & teaching equipment

Sub-Category

N/A

Manufacturer

AKA

Harris

Country

England

State/Province

Unknown

City

Birmingham

Context

Country

Unknown

State/Province

Unknown

Period

Unknown

Canada

PART OF LARGE & VARIED COLLECTION OF OVER 7500 ELECTRICAL ITEMS ACQUIRED & DOCUMENTED BY ONTARIO HYDRO IN 1960S. COLLECTION WAS THOUGHT TO BE LARGEST & MOST COMPREHENSIVE IN CANADA & WAS DONATED TO NMST IN 1992.

Function

INSTRUMENT FOR DETECTING EXISTENCE & DETERMINING STRENGTH OF SMALL ELECTRIC CURRENTS.

Technical

TANGENT GALVANOMETER WAS FIRST DESCRIBED IN 1837 BY CLAUDE-SERVAIS-MATHIAS POUILLET (1790-1868), WHO LATER USED THIS FORM OF GALVANOMETER TO VERIFY OHM'S LAW. THESE LARGE STATIONARY COIL TYPE GALVANOMETERS WERE STANDARD CURRENT MEASURING INSTRUMENT INTO LAST QUARTER OF 19TH C. & WERE STILL IN USE IN 20TH C.(REFS. 2&3).

Area Notes

Unknown

Details

Markings

INCISED WHITE LETTERING IN WOOD READS "P. HARRIS & Co. Ld. BIRMINGHAM, ENGLAND"/ BLACK SCALE MARKINGS

Missing

UNKNOWN

Finish

BASE STAINED BROWN & COATED/ GOLD COLOURED METAL/ WHITE SCALE/ GREEN FABRIC

Decoration

N/A