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}} Forty Mile Point Light is a lighthouse in Northern Michigan, in Presque Isle County on Hammond Bay on the western shore of Lake Huron in Rogers Township, Michigan USA. Unlike many Great Lakes lighthouses, Forty Mile Point Light does not mark a significant harbor or river mouth. Rather, it was constructed with the intent that as one sailed from Mackinaw Point to the Saint Clair River, one would never be out of viewing range of a lighthouse.〔(Detroit News, Interactive map on Michigan lighthouses. )〕 With no river or harbor to use for a name, the light is named on the basis that it is sailing distance from Mackinaw Point. It is part of U.S. Coast Guard District No. 9.〔(National Park Service, Maritime Heritage Project, 40 Mile Point Light. )〕 ==History== While the Presque Isle Peninsula had been lighted since 1840, and the entrance to the Cheboygan River fifty miles to the north had been lighted since 1851, the New Presque Isle Light's range of visibility of and the Cheboygan Crib Light's visible range of left an unlighted intervening stretch of coastline along which mariners had to navigate blind. In its annual report for fiscal 1890, the Board recommended that $25,000 be appropriated for the construction of a new light and fog signal at Forty Mile Point near Hammond's Bay, at the approximate midpoint between the two lights.〔(Terry Pepper, Seeing The Light - Forty Mile Point Lighthouse )〕 Congress apparently was unimpressed with the request and it was five years before it was approved and funded. The plan for this light is nearly identical to the one for the Big Bay Point Lighthouse on Lake Superior that was constructed at the same time. The penury of Congress concerning light stations on the Great Lakes was not limited to Forty Mile Point. ''See, e.g.,'' Port Sanilac lighthouse. The footings are limestone and the structure is . The integrated tower is square and high. The house contains two identical apartments (presumably for the keeper and the assistant keeper, but ordinarily the assistant got a smaller, not identical apartment). A unique feature is a skylight in the stairs so the keeper or his assistant could observe the light working without going outside or climbing the tower. The light was completed in November 1896, but traffic on the Great Lakes is not a year round event, so it wasn't until the spring of 1897 that it was first lit. The station was automated in 1969 and is still operational. Foundation materials are wood pilings, and it is constructed of brick in a square shape. Markings are white with a black lantern. Another structure is attached to the tower. The original lens was a fourth order Fresnel lens designed and manufactured by Henry-Lepaute in Paris. It had six bulls-eye flash panels, and the clockwork would rotate it so that it would emit a white flash every ten seconds.〔(Terry Pepper, Seeing the Light - Forty Mile Point Light )〕 The lens now in place is the third or fourth such lens to occupy that position.〔( Lens, Forty Mile Lighthouse Society. )〕 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「Forty Mile Point Light」の詳細全文を読む スポンサード リンク
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