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}} Long Point Light Station is an historic lighthouse at the northeast tip of Long Point in Provincetown, Massachusetts. As a navigational aid, it marks the southwest edge of the entrance to Provincetown Harbor. The United States Coast Guard Light List describes it simply as a "white square tower".〔 The light it casts is green, occulting every 4 seconds, and, at a focal height of above mean sea level, has a visible range of . When the weather affords low-visibility, one can hear the station's fog horn – sounding a single blast for two seconds, and repeating every 15 seconds – as it seems to call out for (and answer calls from) its nearly-identical closest neighbor, the Wood End Light. ==History== By an act of Congress on May 18, 1826, the United States Government earmarked $2,500 to acquire at the extreme tip of Long Point, and to establish a lighthouse to guide mariners into the busy fishing port of Provincetown Harbor.〔 In comparing the relative share of the gross domestic product (GDP), or "nominal GDP", that's the equivalent of today's Congress allocating $48 million in 2013 dollars. Completed in 1827, the original Long Point Light was not a tower structure, but rather consisted of an octagonal lantern centered on the peak of the roof of the wooden keeper's house. Access to the lantern was by a spiral stair from the top floor of the house. That architectural style, common to several of Cape Cod's early 19th century lighthouses, came to be known as the "Cape Cod style" – today, however, "classic" examples of that style can only be found along the Pacific Coast. The lantern was lit by a sixth-order Fresnel lens in 1856. By 1873, a lighthouse inspector's report noted substantial erosion, exposed wooden pilings, and poor overall condition of the light station, expressing concern that a strong storm could carry it away. Shortly thereafter, the Lighthouse Board decided to replace the entire structure. The present-day tall, square brick lighthouse and a one-and-one-half-story keeper's dwelling to its south were completed in 1875. The lighthouse included a larger, fifth-order Fresnel lens, and a fog bell was installed to the north of the tower. In 1904, the station received an oil house for properly storing flammable materials used for illumination. In 1927, the intensity of the light was reduced to 29,000 candlepower. Long Point Light underwent automation in 1952, and a modern optic replaced the Fresnel lens. In 1982, Long Point Light became the second lighthouse in Massachusetts to be equipped with solar panels to power the light and fog signal equipment. The abandoned keeper's dwelling and fog signal building were demolished around the same time.〔 The Long Point Light Station was added to the National Historic Register in 1987. The light and its 1904 oil house are the only structures left on Long Point, which is now part of the Cape Cod National Seashore. 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「Long Point Light」の詳細全文を読む スポンサード リンク
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