Who developed a practical steam engine?

The first practical steam engine was developed by Thomas Newcomen and  patented by him. It was  developed around 1712 and described as an atmospheric engine. It was simply referred to as Newcomen engine.

It was considered the first steam engine to harness steam power and use it for mechanical purposes.

The Newcomen engine was so successful that it remained superior to all others for about fifty five years before it could be bettered.

The Newcomen engine was later improved by a man named James Watt who made it work more efficiently.

the main inference that can be drawn from jean jacques rousseau's book the social contract is: a. people can enjoy civil and physical freedom, even if it sometimes harms society.

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special interest groups must step back and let the process work itself out a representative can amend it at several points in the congressional staffers must do homework and report to the floor on what they 've learned