| 31. | 1792 : READING AFTER DARK William Murdock in Cornwall, England, lights his home using coal gas.
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| 32. | It was a slide valve coal gas engine.
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| 33. | The whole of the UK was converted from coal gas to natural gas in the 1970s.
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| 34. | Coal gas was initially manufactured by independent companies but many of these later became municipal services.
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| 35. | The manufacture of coal also provided coal gas, which could be used for heating and lighting.
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| 36. | The city became the first major urban area to switch from manufactured coal gas to natural gas.
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| 37. | It has a capacity of 14, 000 cu . ft . and is inflated with coal gas.
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| 38. | Many mines lack fans or other forms of ventilation to disperse volatile coal gas produced while mining.
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| 39. | He died in his London flat of coal gas poisoning in 1930, probably by his own hand.
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| 40. | Coal gas supplied fuel for interior lighting.
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