What effect did factories have on the population of cities on the 1800s?

Industrial Revolution happened between 1760 and 1840’s. During this period, factories mushroomed and replaced people in doing manual labor. Because of this, majority of the people stopped doing labor work and set the machines do the tasks and work for them. The advent of Technology and Agriculture advancements improved the nutrition of people so eventually, the population grew as women and men have more time to take care and build their families. The booming of factories literally changed their way of living.