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Keywords:
GAS,
PURIFICATION,
TESTS,
SULPHUR,
IMPURITIES,
EXPERIMENTS,
CARBON,
BISULPHIDE,
IRON,
OXIDES,
HYDROGEN,
AMMONIA,
LIME,
PURIFIERS,
GASWORKS,
SULPHIDES,
REMOVAL,
CALCIUM,
NAPHTHA,
TEMPERATURE,
COLOURS
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© Thomas Telford and ICE
1880
