Such petroleum as when tested in the manner set forth in Part II of the Second schedule of the Petroleum (Consolidation) Act 1928 gives off an inflammable vapour at a temperature of less than 73ºF (22. 8ºC)
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}