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).
Electrical experimental record sheet for a bone grey fibre rubbing block sample.
| Identifier | ExFiles\Box 69\1\ scan0369 | |
| Date | 14th May 1924 | |
| ELECTRICAL EXPERIMENTAL RECORD SHEETS. X4646 12 Bone grey fibre rubbing Block. (1ST Sample) Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles. 2-6-24 | lab. | 12-6-24 | received from R.H.C. fitted to distributor on 9PK 9-7-24 | 9PK | | Dimensions before running top .255" middle .254" bottom .253" | 35 17-12-24 | 9PK | | Dimensions after running top .249" bottom .248" | | | approx 10,000 18-12-24 | | | car handed to repair dept 14.5.24. X4646 | ||