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Moving Coil Mirror Galvanometer (Leeds & Northrup)


The instrument consists of a black metal cylinder mounted vertically on a circular base with 3 height adjustable feet. On the bottom of the circular base there is a movable oval plastic attachment with labels “SENS.0041 μ A/mm”, “C.D.R.X.310(Ohm Symbol)”, “PERIOD5sec”, “RESIST24 Ω“. The base has two electrical terminals. Along the length of the cylinder there is a vertical glass window to which a meter attached to copper wires can be seen. On the top of the cylinder there is a brass knob with the following labels “Made in U.S.A”, “Zero Adjuster”, “Coil Clamp”.

Accession Number:

Alternative Name: Type R Galvanometer

Primary Materials: Metal: Iron Alloy?, Plastic, Glass


On the metal base there is a label “535283” with a etching “1568”. On the top of the cylinder there is a brass knob labelled “Made in U.S.A”.

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


For precise measurements of electric current.


Excellent: The instrument shows little sign of wear, use, or damage.

Associated Instruments:;;;;;;


Leeds & Northrup Co. Philadelphia, PA.

Date of Manufacture: 1920-1960s?


Department of Physics, University of Toronto

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: