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).
Letter from the Experimental Department regarding a 'Yvel Granite' type lamp bulb.
| Identifier | ExFiles\Box 166\4\ img222 | |
| Date | 12th November 1938 | |
| 6089. EXPERIMENTAL DEPARTMENT. Rm{William Robotham - Chief Engineer}/RC.{R. Childs}14/JH. 12th. November, 1938. The British Thompson Houston Co.Ltd., RUGBY. For the attention of Mr. H.W. Edmundson. Your ref. Lamp Works. HWE. Dear Sirs, We thank you for your letter of the 11th inst. and have arranged for a 'Yvel Granite' type lamp bulb to be sent to you for investigation purposes. Open this bulb up if it is of any help to you. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||