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).
Laboratory comparison report of two petrol samples, 'Mex' and 'BP1', detailing their properties.
| Identifier | ExFiles\Box 20\4\ Scan017 | |
| Date | 11th February 1921 | |
| R.H. 238A (100 T) (S.H 159 11-8-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2500 X.976 Hs{Lord Ernest Hives - Chair} 2 RECEIVED FEB 11 1921 a Mr Alvey. c Mr Warwick. Laboratory. H19/EB11.2.21. X976 X985 X1356 Re Two Tins of Petrol submitted to-day, one marked Mex, and one marked BP1, with covering note from Mr Warwick. Mex. Specific Gravity .760 Boils at 84°C. First distillate over at 91°C. 6% distilled over at 100°C. 11% " " " 105°C. 15.5% " " " 110°C. 22% " " " 115°C. 28.5% " " " 120°C. 36% " " " 125°C. 43% " " " 130°C. This petrol seems identical with the sample submitted yesterday. BP1. Specific Gravity .727 Faint bubbles at 49°C. Boils at 72°C. First distillate over at 78°C. 8.5% distilled over at 85°C. 15% " " " 90°C. 24% " " " 95°C. 32% " " " 100°C. 40.5% " " " 105°C. 49% " " " 110°C. 60% " " " 115°C. 65% " " " 120°C. 72% " " " 125°C. 78% " " " 130°C. 83% " " " 135°C. 86% " " " 140°C. 90% " " " 145°C. 92% " " " 150°C. 94% " " " 155°C. Hl. HE | ||