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).
Internal request to place an official order for two thermostat units with specific temperature settings.
| Identifier | ExFiles\Box 156\1\ scan0176 | |
| Date | 28th April 1937 | |
| To Roy.{Sir Henry Royce} from Rm{William Robotham - Chief Engineer}/Std. c. to G/JWH. 1328 Rm{William Robotham - Chief Engineer}/Std.2/AP.28.4.37 Will you please arrange to send an official covering order to The British Thermostat Co.Ltd., for two thermostat units to drawing B.G.A. 3357.A, one being set to commence lifting at 75°C ± 1°C, and the other at 80°C ± 1°C. Rm{William Robotham - Chief Engineer}/Std. | ||