In the early 20th century, thousands of boys were employed in glass making industries. Glass making was a dangerous and tough job especially without the current technologies. The process of making glass includes intense heat to melt glass (3133 °F). When the boys are at work, <answer>they are exposed to this heat</answer>. This could cause eye trouble, lung ailments, heat exhaustion, cut, and burns. Since workers were paid by the piece, they had to work productively for hours without a break. Since furnaces had to be constantly burning, there were night shifts from 5:00 pm to 3:00 am. Many factory owners preferred boys under 16 years of age.
Under glass making conditions were the children exposed to any heating elements?
they are exposed to this heat