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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).
Analysis of a sample of petrol containing 11.5% Benzole, detailing distillation and chemical composition.

Identifier  ExFiles\Box 20\6\  Scan076
Date  16th January 1925 guessed
  
Hs{Lord Ernest Hives - Chair} for
Mr.Robotham
H15/EA16125
.Laboratory.
Exptl. Dept.

Re Sample of Petrol containing 11.5% Benzole.

Distillation :-
Specific Gravity .712
Initial Boiling Point ---- 38°C
Final Boiling Point -----183°C
Residue ------------- 1.5%
Total distillate ------ 97.5%
Loss ----------------- 1.0%

Temperature °C % Distillate.
70 4.0
80 18.0
90 38.0
100 58.5
110 73.0
120 81.0
130 86.5
140 90.5
150 92.0
160 94.0
170 95.5

Analysis.
Olefines and Di-olefines --- 8.8 %
Aromatic Hydro-carbons ----25.2 %
Paraffins and Cyclo-paraffins 66.0 %

H1.
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