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).
List of samples of insulating materials for machining tests.
| Identifier | ExFiles\Box 24\2\ Scan142 | |
| Date | 6th May 1921 | |
| X.1109 6.5.21. LIST OF SAMPLES OF INSULATING MATERIALS FOR MACHINING TESTS. Ref. Letter. Particulars. A.{Mr Adams} Bakelite disc. B.T.H.Co. B " plate, Arch. Campbell. C " dilecto (brown) Continental Fibre Co.U.S.A D " " (black) " " " " E Continental Bakelite, " " " " F " " " " " " G Beldalite, Beldam Tyre Co. H Diamond fibre plate, red. Diamond Fibre Co. I " " " natural. " " " J Hightensite moulding. Hightensite Ltd. K Isolite. L Litholite, grade GX Litholite Ltd. M " " P " " N Siluminite, unfinished moulding, Siluminite Insu:Ltd O " finished " " " " P Solidite. Improved Solidite Insulator Co. Q Stabalite rod. New Eccles Rubber Co. R Vulcanite rod. " " " " S Hightensite plate. Hightensite Ltd. 19 samples. ----------- EFC. | ||