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 the Octane Number against the percentage by volume of Benzol.
| Identifier | ExFiles\Box 150\1\ scan0065 | |
| Date | 1st October 1935 | |
| BENZOL RESPONSE CURVES Octane Number — C.F.R. Motor Method ETHYL→80 Previous ETHYL Standard →76 Benzol Mixtures Nº 1 Grades Nº 3 Grades 82 81 80 79 78 77 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 Percent by Volume of 90's Benzol 10% 20% 30% 40% 50% 60% ETHYL EXPORT CORPORATION. October 1935 | ||