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).
Title page for a document about Ballast Resistance.
| Identifier | ExFiles\Box 47\4\ Scan054 | |
| Date | 24th June 1924 guessed | |
| BALLAST RESISTANCE ------------------ | ||