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).
Approval for an instruction book update regarding battery acid specific gravity in hot climates.
| Identifier | ExFiles\Box 26\2\ Scan231 | |
| Date | 31th March 1921 | |
| X.995. To Mr. Walker from EFC. EFC3/T31.3.21. X.995 - INSTRUCTION BOOK. X.664. In answer to your W1/VM30.3.21 we approve of the insertion in the Instruction Book of the proposed paragraph relating to specific gravity of acid in batteries used in hot climates. EFC. | ||