Graph plotting Breaks Per Sec. against primary and secondary values.
| Identifier | ExFiles\Box 164\5\ img370 | |
| Date | 12th July 1938 guessed | |
| PRIMARY C... 2 4 SECONDARY BREAKS PER. SEC. 0 40 80 120 160 0 2 4 6 0.8 1.6 2.4 | ||
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).