What I learned from this chapter was that the North was much more open then the South. Machinery was used and actual factory workers were paid unlike slaves in the South. Southerners called factory workers "wage slaves".
Cabot Lowell invented a machine that spun cotton into thread and then tread into cloth. Lowell hired women to work for him and they would work from 12-15 hours straight, having only Sundays off.
I think Lowell hiring these young women may have been a contribution to child labor laws. Young women having to work 12-15 hours a day takes a lot of physical toughness that could injure the young ladies later in the future.