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).
Requesting an electrolytic vacuum valve for experimental work.
| Identifier | ExFiles\Box 41\2\ Scan001 | |
| Date | 9th August 1919 | |
| X.3646 To Oy. from EFC. c. to CJ. EFC1/T9.8.19. X3646. RE ELECTROLYTIC VACUUM VALVE. You may remember when you were here, you said you might possibly obtain for me one of the above and forward it for the purpose of experimental work. I should like to know if you can do this. EFC. | ||