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).
Chemical analysis report for Nickel Ballast Resistance Wires.
| Identifier | ExFiles\Box 168a\5\ img016 | |
| Date | 16th September 1926 | |
| X8220 Mr. Hall's analysis. 16.9.26. NICKEL BALLAST RESISTANCE WIRES X.8720. Manganic. Stores. Expl. Mn - 3.33% Negligible. Negligible. Mg - 0.14% Traces. Traces. Fe - 0.10% 0.20% 0.30% Other constituents negligible. | ||