Perhaps the chief American inventor in the domain of the alternating current is Elihu Thomson, who began his useful career as Professor of Chemistry and Mechanics in the Central High School of Philadelphia.

Another great protagonist of the alternating current was George Westinghouse, who was quite as much an improver and inventor as a manufacturer of machinery.
Two other inventors, at least, should not be forgotten in this connection: Nicola Tesla and Charles S.Bradley.Both of them had worked for Edison.
The turbine (from the Latin turbo, meaning a whirlwind) is the name of the motor which drives the great dynamos for the generation of electric energy.

It may be either a steam turbine or a water turbine.

The steam turbine of Curtis or Parsons is today the prevailing engine.

But the development of hydro-electric power has already gone far.