Steam machines

Steam traction still provides a significant portion of the required energy. Even the best of modern nuclear reactor is just a heat source that turns water into steam to turn turbines connected to electric generators.
The first steam engine was built by the inventor of ancient Greek Heroes of Alexandria. Hollow bullet was attached to the two pipes in such a way that she could move. Through pipes is supplied steam from a small boiler. She filled a bowl and went through two tubes on both sides of the ball. Jets of steam forced the ball to rotate. Although the equipment was of particular interest, in those days it was unnecessary.
The first steam machine, which found practical application, was established in 1698 by English engineer Thomas Severin. Steam was cooled in the chamber before the formation of the condensate. Due to sharp reduction of volume occurred, the partial vacuum used for pumping water from coal mines.