煤焦油是伦敦煤气道路照明几乎无限的副产物，利用便宜量大的煤焦油，染厂于1857年开始生产世界上第一种合成染色材料。
Utilising the cheap and plentiful coal tar that was an almost unlimited byproduct of London's gas street lighting, the dye works began producing the world's first synthetically dyed material in 1857.
与此同时，大城市开始涉足商业，为纳税人提供照明、有轨电车和其他服务。
At the same time the great municipalities went into business to supply lighting, trams and other services to the taxpayers.
与此同时，大城市开始涉足商业，为纳税人提供照明、有轨电车和其他服务。
At the same time the great municipalities went into business to supply lighting, trams and other services to the taxpayers.
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