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).
Blueprint diagram showing the setup for measuring battery vibrations.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan123 | |
| Date | 8th January 1931 guessed | |
| [ "CANTILEVER", "Hs{Lord Ernest Hives - Chair} 303", "Hs{Lord Ernest Hives - Chair} 302", "STEAM INDICATOR", "BATTERY BOX", "MEASUREMENT OF BATTERY VIBRATIONS" ], | ||