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 order special black insulating compound from British Insulated Cables Ltd.
| Identifier | ExFiles\Box 167\3\ img008 | |
| Date | 3rd December 1936 | |
| 6110 To Roy.{Sir Henry Royce} from Rm{William Robotham - Chief Engineer}/Wst. Rm{William Robotham - Chief Engineer}/Wst.17/AP.3.12.36. Will you please order for us from Messrs British Insulated Cables Ltd., Prescot, Lancs, 10 lbs. of special black insulating compound, melting point 240°F, similar to the sample recently submitted to us for test - 0/54001. Rm{William Robotham - Chief Engineer}/wst. C = 5/9 (F-32) = 115° C | ||