The object is black and cylindrical. It has a circular tripod base; each of the feet can be adjusted for stabilization. Rising vertically from this is a 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-shaped label. On the top of the cylinder there are two upright connectors, one labelled “ZERO ADJUSTER”, the other “COIL CLAMP.”
The instrument wrapped in a plastic bag which also contains two small brown envelopes and a small rectangular box.
Accession Number: 2009.ph.21
Primary Materials: Metal, Plastic, Glass
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 = 22, Diameter = 13
Precision measurement of electrical current.
Excellent. The object appears to be in its original wrapping and shows no evidence of use.
Leeds & Northrup Co., Philadelphia, Pennsylvania, USA
Date of Manufacture: c. 1960s
University of Toronto Department of Physics
Additional Information and References: