Book5 Unit1 reading?

John Snow was a well-known doctor in London in the 19th century.

He wanted to find the cause of cholera in order to defeat it. In 1854 when a

cholera broke out, he began to gather information.

He marked on a map where all the dead people had lived and he found that many

people who had drunk the dirty water from the pump died.

So he decided that the polluted water carried cholera.

He suggested that the source of all water supply be dealing and new methods of

examined with polluted water be found.

Finally, “King Cholera” was defeated.

John Snow是19世纪伦敦的一位著名的医生。为了预防霍乱，他想查明引起霍乱的原因。1854年，当霍乱爆发的时候，他开始收集相关的信息。他在一张图上注明所有的死人居住过得地方，发现许多喝过抽水机打的水的人都死了。因此，他断定是勿让的水源带来了霍乱。他建议了处理供水来源的意见并发现了检测污水的新方法。

最后，“霍乱之王”被防治了。