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).
Graph plotting electrical measurements including amperes, ampere-hours, and ohms for a circuit test.
| Identifier | ExFiles\Box 48\3\ Scan339 | |
| Date | 22th November 1923 | |
| 11 12 108 X.4218 / 2 3 Fars 22-11-23 45 -> / Average amperes = 64.5 Amperes per div = 19.5 Ampere hours = 29.0 Ohms in circuit = 1.75 X4218 | ||