Reflecting Galvanometer

Physics

Accession Number: 2009.ph.21

Description:

The object is wrapped in a plastic bag which also contains two small brown envelopes and a small rectangular box.

The object has a circular tripod base; each of the feet can be adjusted for stabilization. The object has a vertical cylinder with a glass window at the front through which a filament and a round mirror is visible. At the base of the mirror are two cylindrical knobs, one with a asterisk shape label. On the top of the cylinder there are two upright connectors, one labelled “ZERO ADJUSTER”, the other “COIL CLAMP.”9

Primary Materials: Metal, Plastic, Glass

Markings:

On the top of the cylinder: “MADE IN U.S.A.” “ZERO ADJUSTER”, “COIL CLAMP”

On the rim of the base: “1708457”

Embossed on the base: “LEEDS & NORTHRUP CO., PHILADELPHIA, PA”

On a brass plaque on the back: “U. of T. PHYSICS No. 66 D31 053”

Dimensions (cm): Height = 22cm, Diameter = 13

Function:

Precision measurement of electrical current.

Condition:

Excellent. The object appears to be in its original wrapping and shows no evidence of use.

Associated Instruments:

2009.ph.10; 2009.ph.176; 2009.ph.177; 2009.ph.178; 2015.ph.638; 2015.ph.664; 2015.ph.665

Manufacturer:

Leeds & Northrup Co., Philadelphia, Pennsylvania, USA

Date of Manufacture: c. 1960s

Provenance:

University of Toronto Department of Physics

Additional Information and References:

Instructions for use can be found here on the website of the Robert A. Paselk Scientific Instrument Museum, part of the Humboldt State University [Accessed 30 October, 2016].

Historical Notes: