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).
Experiment observing the oxidation of Tungsten Points.
| Identifier | ExFiles\Box 35\5\ scan 142 | |
| Date | 24th January 1919 | |
| RR.300 (120B) (SF 349 24-1-19) MP 200552 88216 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: Oxidation of Tungsten Points 19 Customer's No. (Expt 1) 2 Re: This demonstrates that the oxide formed on the positive, has considerable resistance, whereas the negative discolouration, has very little. Neither shows any tendency to fall off, but changing the polarity and sparking, quickly transfers the black scale to the opposite rod. Signed: Francis J Allen. This Sheet must be filed on completion of the work. | ||