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).
Wiring, agreeing that it is not necessary to show the earthing connections.
| Identifier | ExFiles\Box 168b\2\ img124 | |
| Date | 13th August 1926 | |
| X7560 To EY/HEB.{H. Biraben} from EFC. EFC3/T13.8.26. EAC.7. - WIRING. X.7560. With reference to your EY/HEB{H. Biraben}7/M.12.8.26, we agree that it is not necessary to show the earthing connections, as in F.75192. EFC. | ||