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).
Graph from Ley's Malleable Castings Co., Ltd. detailing the effect of temperature on the tensile properties of 'Lepaz'.
| Identifier | ExFiles\Box 120\1\ scan0143 | |
| Date | 3rd April 1936 guessed | |
| LEY'S MALLEABLE CASTINGS Co., LTD. TONS PER SQUARE INCH. PER CENT. DEGREES CENTIGRADE ULTIMATE STRESS YIELD POINT REDUCTION OF AREA ELONGATION. EFFECT OF TEMPERATURE ON THE TENSILE PROPERTIES OF 'LEPAZ' | ||