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).
Page 2 of a letter concerning the subjection of a coil to a specific ambient temperature.
| Identifier | ExFiles\Box 164\5\ img403 | |
| Date | 4th February 1939 | |
| -2- Rm{William Robotham - Chief Engineer}/RC.{R. Childs}3/JH. 4th. February, 1939. time, the coil is subjected to an ambient temperature of 70°C. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||