Lighthouses
The first navigational lights in the New World were probably lanterns hung at harbor entrances. The first lighthouse was put up by the Massachusetts Bay Colony in 1716 on Little Brewster Island at the entrance to Boston Harbor. Paid for and maintained by light dues levied on ships, the original beacon was blown up in 1776. By then there were only a dozen or so true lighthouses in the colonies. Little over a century later, there were 700 lighthouses. The first light erected on the West Coast in the 1850s featured the same basic New England design: a Cape Cod dwelling with the tower rising from the center or standing close by. In New England and elsewhere, though, lighthouses reflected a variety of architectural styles. Since most stations in the Northeast were built on rocky eminences, enormous towers were not the rule. Some were made of stone and brick, others of wood or metal. Some stood on pilings or stilts; some were fastened to rock with iron rods. Farther south, from Maryland through the Florida Keys, the coast was low and sandy. It was often necessary to build tall towers there - massive structures like the majestic Cape Hatteras, North Carolina, lighthouse, which was lit in 1870. At 190 feet, it is the tallest brick lighthouse in the country. Notwithstanding differences in appearance and construction, most American lighthouses shared several features: a light, living quarters and sometimes a bell .They also had something else in common: a keeper and, usually, the keepers family. The keepers essential task was trimming the lantern wick in order to maintain a steady, bright flame. The earliest keepers came from every walk of life - they were seamen, farmers, mechanics, rough mill hands - and appointments were often handed out by local customs commissioners as political plums. After the administration of lighthouses was taken over in 1852 by the United States Lighthouse Board, an agency of the Treasury Department, the keeper corps gradually became highly professional.
GMAT考试词汇精选(MP3+文本) 第172期:Unit22-
GMAT考试词汇精选(MP3+文本) 第181期:Unit23-
GMAT考试词汇精选(MP3+文本) 第174期:Unit22-
GMAT考试词汇精选(MP3+文本) 第179期:Unit22-
GMAT考试词汇精选(MP3+文本) 第38期:Unit5-6
GMAT考试词汇精选(MP3+文本) 第32期:Unit4-8
GMAT考试词汇精选(MP3+文本) 第14期:Unit2-6
GMAT考试词汇精选(MP3+文本) 第180期:Unit22-
GMAT考试词汇精选(MP3+文本) 第10期:Unit2-2
GMAT考试词汇精选(MP3+文本) 第177期:Unit22-
GMAT考试词汇精选(MP3+文本) 第9期:Unit2-1
GMAT考试词汇精选(MP3+文本) 第178期:Unit22-
GMAT考试词汇精选(MP3+文本) 第35期:Unit5-3
GMAT考试词汇精选(MP3+文本) 第36期:Unit5-4
GMAT考试词汇精选(MP3+文本) 第3期:Unit1-3
GMAT考试词汇精选(MP3+文本) 第15期:Unit2-7
GMAT考试词汇精选(MP3+文本) 第40期:Unit5-8
GMAT考试词汇精选(MP3+文本) 第42期:Unit6-2
GMAT考试词汇精选(MP3+文本) 第2期:Unit1-2
GMAT考试词汇精选(MP3+文本) 第31期:Unit4-7
GMAT考试词汇精选(MP3+文本) 第168期:Unit21-
备战中考系列之完形填空(附解析) 第105期
GMAT考试词汇精选(MP3+文本) 第28期:Unit4-4
GMAT考试词汇精选(MP3+文本) 第34期:Unit5-2
GMAT考试词汇精选(MP3+文本) 第171期:Unit21-
GMAT考试词汇精选(MP3+文本) 第6期:Unit1-6
备战中考系列之完形填空(附解析) 第104期
GMAT考试词汇精选(MP3+文本) 第8期:Unit1-8
备战中考系列之完形填空(附解析) 第130期
GMAT考试词汇精选(MP3+文本) 第30期:Unit4-6
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |