What are two features of the industrial revolution of the eighteenth and nineteenth centuries?

The two main changes that the Industrial Revolution of the eighteenth and nineteenth centuries featured according to the Britannica Encyclopedia include:

" (1) the use of new basic materials, chiefly iron and steel

(2) the use of new energy sources, including both fuels and motive power, such as coal, the steam engine, electricity, petroleum, and the internal-combustion engine. "

Ain the free market economic system the government is hands off from all supply and demand rates