GRIFFIN & GEORGE STANDARD CELL, 1950's

The Weston cell, invented by Edward Weston in 1893, is a wet-chemical cell that produces a highly stable voltage suitable as a laboratory standard for calibration of voltmeters. It was adopted as the International Standard for EMF between 1911 and 1990. This cell produces 1.01859 Volts. It is a voltaic cell producing a constant and accurately known electromotive force that can be used to calibrate voltage-measuring instruments

A1406