10 kinds of jobs that no longer exist--there was a job like this before.

With the continuous development of science and technology, a large number of emerging occupations such as social media analyst, mobile phone application development and so on, there are many occupations slowly fade from people's lives. Let's take a look at the 10 careers that were once so important and now no longer exist ...

Bowling caddie usually employs young boys as the responsible for arranging the ball bottles for the guests and earning a meager salary.

Knock on the window as the role of the alarm clock, at a specific time with a bamboo stick knocking at the guest's door or window to ensure that guests can get up on time to work. They are not just knocking twice, but confirming that the guest has got up before leaving.

In a time when refrigeration technology is not ripe, the ice-cutters will come to the frozen lake to transport the chopped ice cubes to people's homes for refrigeration. This is a dangerous occupation and the working environment is very bad.

to prevent enemy attacks.

Prior to the invention of the radar, the army used the surveillance equipment in the map to detect enemy aircraft in the vicinity, and to determine the number, distance and speed of the enemy aircraft through the sound of the engine.

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In Europe, where mice were employed to control the number of mice, the person who worked in the profession, although exposed to the risk of an infectious disease every day, largely prevented the spread of the disease.

The lamp lights up every street lamp in the city using a long stick (one end of the stick), until it is officially eliminated.

In the absence of truck-assisted transport, it was the duty of the raft workers to float the wood and lead the wood from the logging site to the processing site.

Until 30, telephone operators remained an essential part of the telecommunications industry, which dealt mainly with long-distance calls and the number of busy calls. But with the development of digital telecommunications, this position has been eliminated.

As far back as 19th century, there were few bodies for medical students to conduct anatomical studies, and only other channels were available to acquire teaching resources, and the occupation of exhumation of the tomb was born.

Because the running water in the factory is so boring, most of the factories will take part of the workers ' wages to hire the newspaper readers, as a kind of entertainment in the work, let the workers get up and work.