The three types of people who worked in the coal mines in the mid to late
1800s were:

The two main groups of workers in the pit were hewers and putters. Hewers began their job at about age twenty, after working at other jobs in the mines for several years. They dug the coal loose from its underground seam using only a pick and their own strength. It was a back-breaking job.  The early 1800s saw great changes in people’s working lives, People moved away from earning

their living in farming and towards industrial work. This period is commonly known as the Industrial

Revolution. It was usual for children from poor families to start work very young.

Many industries grew quickly as owners of businesses and factories pushed their work force to

improve their profits so that the business could continue to expand. This added to dangers in the

workplace, but some industries were already very risky. This was especially true in the case of

coal mining.

Work in Mines

Explanation:

Background Information:

Working Conditions

in 19th Century Mines

Hope this helps!

a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )