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 of Benzol response curves, plotting octane number against the percentage of Benzol by volume.
| Identifier | ExFiles\Box 150\1\ scan0066 | |
| Date | 1st October 1935 | |
| BENZOL RESPONSE CURVES Octane Number - C.F.R. Motor Method 82 81 ETHYL-80 79 78 77 Previous ETHYL Standard 76 75 74 73 72 71 70 69 68 67 66 Benzol in a current ETHYL Petrol Approximate Response in a 76 Octane ETHYL Petrol Benzol Mixtures No 1 Grades No 3 Grades Percent by Volume of 90's Benzol 10% 20% 30% 40% 50% 60% ETHYL EXPORT CORPORATION. October 1935 | ||