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).
Laboratory report with two microscopic images showing an oxidised seam in a spring at different magnifications.
Identifier | ExFiles\Box 119\1\ scan0206 | |
Date | 11th May 1939 | |
ROLLS-ROYCE LABORATORY REPORT: HL./EJW. 3/JM.{Mr Morley} 11.5.39. M.1840/6. X 250. Oxidised seam in 13.hr. Spring. M.1840/7. X 950. As M.1840/6. but at higher magnification. | ||