论文部分内容阅读
古时,海员估计经度的方法是推测航法,结果,人们为之蒙受了人力和物力的巨大损失。一七一四年,英国国会设立了一个经度局,授权该局悬赏20,000英磅,如果有人能发明一种测量经度的仪器,使船在行驶六星期后,其误差不超过30哩,就是其平均时间误差在每日三秒以下,便可获得奖金。约克郡一位木匠的儿子约翰·啥里森决定争取这一项巨奖。一七二八年,哈里森设计出了一个航海时钟。六年之后,他向经度局呈上他的一号天文钟。那时他已四十二岁。这
In ancient times, the method for estimating the longitude of seafarers was to speculate on the law of navigation. As a result, people suffered tremendous losses of human and material resources. In 1714, the British Parliament set up a longitude bureau to authorize the council to offer a reward of 20,000 pounds. If someone could invent a device for longitude measurement to allow the ship to have no more than 30 miles of error after traveling six weeks, The average time error of less than three seconds per day, you can get a bonus. John Shalisson, the son of a Yorkshire joiner, decided to win the grand prize. In 1728, Harrison designed a sailing clock. Six years later, he presented his Astronomical Clock to the Bureau of Longitude. At that time he was forty-two years old. This