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Cape Race Lighthouse : ウィキペディア英語版 | Cape Race Lighthouse
In 1856, the first lighthouse was installed by the British Government's Trinity House. It was a cast iron tower with a coal oil lamp turned by clockwork. It was replaced in 1907 by a tall concrete tower and a light with a massive hyperradiant Fresnel lens made by Chance Brothers in England. It had a massive optic emitting a one million candle power flash. Great landfall lights, like those at Cape Race provided the first sight of land for Atlantic or Pacific travellers.〔(The Canadian Encyclopedia Cape Race lighthouse )〕 The original lighthouse was then moved to Cape North; it now stands in front of the National Science and Technology Museum in Ottawa. The light's characteristic is a single white flash every 7.5 seconds, additionally a foghorn may sound a signal of two blasts every 60 seconds. The lighthouse was designated a National Historic Site of Canada in 1975. ==Notes==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Cape Race Lighthouse」の詳細全文を読む
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