320. Treaty with Great Britain, 1842.
320．与大不列颠签订条约（1842年）
Perhaps the most important event of Tyler's administration was the signing of the Treaty of 1842 with Great Britain. Ever since the Treaty of Peace of 1783, there had been a dispute over the northeastern boundary of Maine. If the boundary had been run according to the plain meaning of the Treaty of Peace, the people of Upper Canada would have found it almost impossible to reach New Brunswick or Nova Scotia in winter. At that time of the year the St. Lawrence is frozen over, and the true northern boundary of Maine ran so near to the St. Lawrence that it was difficult to build a road which would be wholly in British territory. So the British had tried in every way to avoid settling the matter. It was now arranged that the United States should have a little piece of Canada north of Vermont and New York and should give up the extreme northeastern corner of Maine. It was also agreed that criminals escaping from one country to the other should be returned. A still further agreement was made for checking the slave trade from the coast of western Africa.
也许泰勒政府最重要的一件事是1842年与大不列颠签订条约，自从1783年《和平条约》签订以来，双方一直存在关于缅因东北部边界的争议，如果这个边界是《和平条约》中简单界定的样子，居住在加拿大高纬度地区的人就不可能到达新不伦瑞克或者诺瓦斯科夏。每年的冬季圣劳伦斯河会结冰，缅因州实际的北部边界非常接近于圣劳伦斯河，甚至难于修建一条完全属于英国领土的路，因此英国极力避免解决这个问题。现在双方议定美国拥有福蒙特和纽约州以北加拿大的一小块土地，并放弃缅因州最东北角的土地，还议定两个国家相互遣返逃跑的罪犯，另一个进一步的协定是阻止来自非洲西海岸的奴隶贸易。
321. The Electric Telegraph.
321．电报
Benjamin Franklin and Joseph Henry made great discoveries in electricity. But Samuel F. B. Morse was the first to use electricity in a practical way. Morse found out that if a man at one end of a line of wire pressed down a key, electricity could be made at the same moment to press down another key at the other end of the line of wire.
本杰明·富兰克林和约瑟夫·亨利有一些关于电的伟大发现，但是，萨缪尔·F·B·摩尔斯才是第一个将电应用于实践的人。摩尔斯发现，如果一个人在一个导线的一端按下一个键，产生的电流会立刻按下导线另一端的另一个键，