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).
Comparative analysis of two grades of Esthonian Shale Spirits from the Ethyl Export Corporation.
| Identifier | ExFiles\Box 27a\4\ Scan057 | |
| Date | 7th February 1933 guessed | |
| ESTHONIAN SHALE SPIRITS EX ETHYL EXPORT CORPORATION Grade No. 1 No. 2 S/No. 9182 9183 Specific Gravity @ 60°F .7355 .7355 Initial Boiling Point 45°C 45°C Distillation @ 50°C 1% ½% 60 4 4 70 11½ 11½ 80 20½ 21 90 31½ 32 100 41½ 42 110 52 52½ 120 61½ 62 130 70½ 71 140 78½ 78½ 150 85 85½ 160 90 90½ 170 93½ 94 180 95½ 96 190 96½ 97 End Point 191°C 191°C Recovery 97½% 98% Residue 1½ 1½ Distillation loss 1 ½ Iodine No. 220 210 Corrosion @ 122°F Good Good Gum 1 mgm 1 mgm Sulphur .35% .35% Doctor Negative Negative Freezing Point Below -60°C Below -60°C Colour + 21 + 22 Octane Number at 212°F 67.5 " " " 300°F 63.0 " " " + 1 c.c. T.E.L. 66.0 " " " 2 " 67.5 " " " 3 " 69.0 | ||