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).
Continued page discussing comparative utility tests for battery and magneto ignition systems.
| Identifier | ExFiles\Box 4\5\ 05-page212 | |
| Date | 14th July 1921 guessed | |
| -2- Contd. be very suitable for comparative utility tests, on the battery ignition if used with the screw terminals, and an magneto ignition if used with the mercury contacts. It does not seem possible to measure its resistance when carrying H.T. current. RJA. | ||