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).
Correct thickness of ebonite separators for P & R and Exide batteries.
| Identifier | ExFiles\Box 54\5\ Scan090 | |
| Date | 29th April 1926 | |
| To ROY.{Sir Henry Royce} from EFC. X4655 EFC1/T29.4.26. RE EBONITE SEPARATORS. Answering your ROY{Sir Henry Royce}7/MG28.4.26, it is arranged that the .4 mm. separators will continue to be fitted on both P & R and Exide batteries. The impression that the ebonite thickness on the Exide was .5 mm. has turned out to be incorrect. ROY.{Sir Henry Royce} | ||