The initial source of power was water, that was used to turn mills.
Water
Water
Water
The new machines were too large for a home and had to be put in a factory.
Water - Byron J Espinal
Whitney invented new machines such as the cotton gin, and interchangeable parts. That helped production of cotton in the north. Slater was a factory worker in Britain he studied the machines then secretly came to New England and started a factory based on Britain's ideas triggering the start of the Industrial Revolution.
The machines in the factory.
Six people can run 3 machines in the factory. How many machines can 18 people run?
Because machines are working
it was made in a factory by machines
machines
made by machines