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).
List of approximate capacities in microfarads for various experimental condensers and magnetos.
| Identifier | ExFiles\Box 52\3\ Scan323 | |
| Date | 28th April 1917 | |
| -2- APPROXIMATE CAPACITIES IN MICROFARADS OF EXPERIMENTAL CONDENSERS. Magneto. { M 1 .105 M 2 .140 M 3 .213 M 4 .215 EFC. {E. Fowler Clarke - Electrical Engineer} .575 W.E. .50 R.R.1 .073 R.R.2 .122 R.R. 235A (500'T) (S.D. 408 28-4-17) Bm. 275943. | ||