Early light-houses had problems with using coal fires, and mirror-glass reflectors[1]. The use of coal-fireshad been laidaside, and oillights, with reflectors, had been introduced[1]. The mirrors were made of glass, but a better design employed sheets of copper coated with silver[1]. The older light-houses were made of wood, which was shut off from the air and dried to the state of tinder[1].
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