Great Britain was one of the most powerful nations in
the world in the 18th century. It led the world in (17)----
new sources of energy for making textiles and
concentrating the process in factories. This was the
Industrial Revolution. In New England, America, small
factories first appeared in the 1790s. Thereafter, the
proportion of manufacturing carried out in northern
factories steadily rose (18)---- individual and primitive
ways of production. By 1850, Americans were
pioneering ways (19)---- clocks and firearms using
interchangeable, machine-made parts. Goods poured
out of New England and midwestern factories, and they
spread (20)---- the world. Industrialization fell behind in
the South, (21)---- it was not unknown