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Roughly how many gas lamps are there in London today?
How many people are employed to light the lamps today?
What were some of
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Gas lighting is production of artificial light from combustion of a gaseous fuel, such as hydrogen ... Early gas lights were ignited manually, but many later designs are ... Gas lighting now is generally used for camping, where the high energy ... of London, the residents were reminded to hang out their lanterns at the usual time, ...
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