ID: 
856
Maker's Name: 
Leeds and Northrup
Where made: 
USA
Dimensions: 
18 × 28 × 22 cm

Precision potentiometer.

Measures voltages by comparison with a Weston Standard Cell.

Measures current by measuring voltage drop across a standard resistor.

An additional Volts box is required if voltages above 1.6 Volts are to be measured.