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).
Booklet from Hightensite Limited regarding improvements in insulating materials.
| Identifier | ExFiles\Box 34\2\ Scan076 | |
| Date | 15th June 1921 guessed | |
| IMPROVEMENTS IN INSULATING MATERIALS Hightensite Limited, NORMANDY WORKS, CUSTOM HOUSE, E.{Mr Elliott - Chief Engineer} | ||