Requesting the Works Lab to acid etch and microphotograph a section of a Vauxhall sodium-cooled valve.
| Identifier | ExFiles\Box 127\4\ scan0274 | |
| Date | 18th April 1941 | |
| 1097 To H1/EJW/Mr. West. (Works Lab.) Rm {William Robotham - Chief Engineer} /CTS. {C. Trot Salt - Carburation} 3/ET.18.4.41. This is to confirm that we have handed you a section of a Vauxhall sodium cooled valve. Will you please acid etch and microphotograph this as arranged. Rm {William Robotham - Chief Engineer} /CTS. {C. Trot Salt - Carburation} | ||
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).