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).
Order of battery acid for the Electrical Experimental Department.
| Identifier | ExFiles\Box 63\1\ scan0122 | |
| Date | 4th February 1920 | |
| To O.O. from Ck.{Mr Clark} c. to Stores. X.3035 Ck{Mr Clark}/AT4.2.20. X.3035.-BATTERY ACID. Will you kindly order up for the use of the Electrical Exptl. Dept. one Carboy of best Battery Acid and oblige. Ck.{Mr Clark} This is in addition to the one already ordered by us but not yet received. | ||