In this exercise you will be looking at some changes that occurred in coal mining by the early twentieth century.

These are the questions you should be answering as you look at the pictures and brief texts.

1. Did you see any differences in the pictures of coal miners working with mining machines versus the pictures you saw of the coal mines in the 1870s?
2. Why were mining machines introduced into coal mines?
3. How did the introduction of mining machines change the organization of work in the mines? What impact did it have on miners with traditional skills?