Accession Number: 2009.ph.178
A circular base with 3 height adjustable knobs at the bottom, on the bottom of the circular base there is a moveable oval plastic attachment with labels “SENS .05(“mu symbol”)v/mm”, “C.D.R.X. 10(Ohm Symbol)”, “PERIOD 6.2 sec”, “RESIST 15.2(Ohm Symbol)”. On the metal base there is an etching that reads “346666”. The base has two electrical terminals and a metal cylinder attached to it, along the length of the cylinder there is a glass window through 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”. The top of the device is missing the usual adjuster knob. On the back right of the cylinder near the base is a horizontal adjuster knob; purpose unknown.
Alternative Name: Type R
Primary Materials: Metal, Plastic, Glass
On the metal base there is an etching that reads “346666”. On the top of the cylinder there is a brass knob with the following labels “Made in U.S.A”, “Zero Adjuster”, “Coil Clamp”. The top is engraved “5040”.
Dimensions (cm): Height = 22cm, Diameter = 13cm
2009.ph.10; 2009.ph.176; 2009.ph.177; 2009.ph.21; 2015.ph.638; 2015.ph.664; 2015.ph.665
Leeds & Northrup Co. Philadelphia, Pennsylvania, USA.
Date of Manufacture: 20th Century
Provenance: Collection of Dr. Martin Lee.