Laboratory report showing micrographs of the transverse sections of three different springs, noting the levels of decarburisation on their upper surfaces.
| Identifier | ExFiles\Box 154a\4\ scan0063 | |
| Date | 7th December 1937 guessed | |
| ROLLS-ROYCE LABORATORY REPORT: Transverse section of Woodhead's spring No.24. - partial decarburisation in region of upper surface. M.1486/3 x 250 Transverse section of Firth's spring No.1. - complete decarburisation and oxide in upper surface. M.1486/4 x 250 Transverse section of American spring - complete decarburisation of upper surface. M.1486/5 x 250 | ||
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).