From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Chart of readings for use with a Cadmium Electrode Voltmeter, showing voltage ranges for good cells.
| Identifier | ExFiles\Box 44\5\ Scan009 | |
| Date | 1st September 1925 | |
| X4049 VOLTAGE READINGS TO CADMIUM. FULLY CHARGED & CHARGING +2.5 +2.0 +1.0 0 -.3 -1.0 VOLTAGE READINGS TO CADMIUM. DISCHARGED & DISCHARGING +2.5 +2.05 +1.0 +.25 0 -1.0 -.--.-.--.-. READING OF POSITIVE ELECTRODE TO CADMIUM. --------- READING OF NEGATIVE ELECTRODE TO CADMIUM. NO READING SHOULD COME INSIDE THE SHADED PORTION ON A CELL IN GOOD CONDITION CHART OF READINGS FOR USE WITH A CADMIUM ELECTRODE VOLTMETER g.g. 1-9-25 | ||