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).
One standard Exide hydrometer to be issued from the stores.
| Identifier | ExFiles\Box 44\5\ Scan073 | |
| Date | 17th December 1923 | |
| X.8741 To BP. from EFC. EFC1/T17.12.123. RE EXIDE HYDROMETER. Will you kindly have booked out and charged to me:- One standard Exide hydrometer. I should be obliged if you would instruct the Stores to hand this to me as soon as convenient. EFC. | ||