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).
Log sheet for a Ferranti Ammeter tracking its usage, condition, and mileage from 1928 to 1930.
| Identifier | ExFiles\Box 168\5\ img193 | |
| Date | 2nd September 1930 guessed | |
| EXPERIMENTAL RECORD SHEETS FXNO 3498 Ferranti Ammeter Date on. | Location. | Date off. | REMARKS. | Miles Start. | Miles Finish. | Miles Covered. | Total Miles. --- | --- | --- | --- | --- | --- | --- | --- 26-7-28 | Lab | 21-9-28 | Needle Sticking Badly | | | | 21-9-28 | Returned to makers | 4-10-28 | Retested Report TC129 21-9-28 | | | | 4-10-28 | 9EX | 16-11-28 | | 4542 | 5632 | 1090 | 1090 16-11-28 | " | 2-1-29 | | 5632 | 8119 | 2487 | 3577 2-1-29 | " | 8-2-29 | | 8119 | 8447 | 228 | 3805 8-2-29 | " | 23-3-29 | | 8447 | 8617 | 176 | 3981 23-3-29 | " | 22-4-29 | | 8617 | 9315 | 698 | 4679 22-4-29 | " | 1-6-29 | | 9315 | | 1054 | 5733 1-6-29 | " | 28-6-29 | Glass cracked but working OK | 369 | 1575 | 1206 | 6939 28-6-29 | " | 11-7-29 | Damaged & returned to makers. | 575 | 1980 | 405 | 7344 21-10-29 | 14gIX | 8-12-29 | Received from maker | 9666 | 11579 | 1913 | 9257 8-12-29 | " | 18-1-30 | | 11579 | 12733 | 1154 | 10411 18-1-30 | " | 13-2-30 | | 12733 | 14202 | 1469 | 11880 13-2-30 | " | 12-5-30 | Glass cracked. | 14202 | 30851 | 16649 | 28529 12-5-30 | " | 30-5-30 | | 30851 | 31708 | 1857 | 30186 30-5-30 | " | 18-8-30 | | 31708 | 35744 | 4036 | 34222 18-8-30 | " | | | 35744 | | | Instrument gone with car. GJ. [Vertically in right margin]: X.E. + 98 | ||