Thomas Savery Quote

I only just hint this to show what use this engine may be put to in working of mills, especially where coals are cheap. I have only this to urge, that water in its fall from any determinate height, has simply a force answerable and equal to the force that raises it.

Thomas Savery, pp. 25-26 - The Miner's Friend; or, An Engine to Raise Water by Fire, 1702