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).
On the unsuccessful treatment of a tungsten rod for ignition points.
| Identifier | ExFiles\Box 35\5\ scan 065 | |
| Date | 23th October 1919 | |
| X.2894. X.1818½ h/ 23.10.19. X.2894. - TUNGSTEN CONTACTS. The treatment given to the Tungsten rod by Mr. Hall has not made it possible for this metal to be worked into points for our ignition. L.F. DERBY 50 THS C.L. 28.5.19 (L.O.) W.R. 21/H | ||