 Until about 1900, nearly all coal breaking facilities in the United States were labor-intensive. The removal of impurities was done by hand, usually by breaker boys between the ages of eight and 12 years old. The use of breaker boys began around 1866. For 10 hours a day, six days a week, breaker boys would sit on wooden seats, perched over the chutes and conveyor belts, picking slate and other impurities out of the coal. Breaker boys working on top of chutes or conveyor belts would stop the coal by pushing their boots into the stream of fuel flowing beneath them, briefly pick out the impurities, and then let the coal pass on to the next breaker boy for further processing. Others would divert coal into a horizontal chute at which they sat, then pick the coal clean before allowing the fuel to flow into "clean" coal bins.
