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).
Table showing the chemical composition analysis of three different alloys.
| Identifier | ExFiles\Box 36\3\ scan 119 | |
| Date | 9th February 1917 | |
| ANALYSES OF ALLOYS Designation. Al. Cu. Zn. Sn.{Mr Sanderson} Mn. Fe. Si. Mg. M.3 92.4 2.2 - .27 .01 .47 .40 4.1 M.4 88.5 2.63 7.70 - .03 .35 .33 .36 A.F. 90.2 6.35 1.27 .94 - .55 .38 - (Sgd) H.U.H. R.R. 283 A (770 H) S.D 442. 9-2-17. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1965 | ||