General Information

Serial #

26233

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

Black metal casing has slightly rough-textured front panel; clear glass viewing window mounted in centre front, over small round silvered mirror and iron (?) coil and poles; copper wire frame around coil and wire; 3 black metal contacts mounted below instrument on solid brown wooden board. Galvanometer secured to stand using metal bar.

Dimensions

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

Length

18.5 cm

Width

6.0 cm

Height

37.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Energy-electric

Category

Measurement

Sub-Category

N/A

Manufacturer

AKA

Leeds Northrup

Country

United States of America

State/Province

Pennsylvania

City

Philadelphia

Context

Country

Canada

State/Province

Ontario

Period

Presumably used after 1905.

Canada

Part of a large collection of medical artifacts, archival material & trade literature transferred to CSTM in 2002 from the former History of Medicine Museum, Toronto, ON.

Function

Used to detect and measure electric current. This example used to measure chemical electrical potential. [Ref.3]

Technical

Long, slender coil moves between curved magnet pole pieces to ensure linearity. Mounted on a wall or heavy stand to prevent vibration. [Ref. 4]

Area Notes

Unknown

Details

Markings

"THE LEEDS & NORTHRUP CO./ SCIENTIFIC INSTRUMENTS/ PHILADELPHIA" cast in raised print on front panel. "PATENTED/ JUNE 20, 1905" cast in raised print on small metal plate fixed to underside of wooden panel. "26233" stamped into wooden panel, above plate. UHN catalogue no. "X969.3.13A" printed by hand in white ink on wooden panel.

Missing

Unknown.

Finish

Black metal casing has slightly rough-textured front panel; clear glass viewing window mounted in centre front, over small round silvered mirror and iron (?) coil and poles; copper wire frame around coil and wire; 3 black metal contacts mounted below instrument on solid brown wooden board. Galvanometer secured to stand using metal bar.

Decoration

N/A