THOMAS SAVERY 1698 





THOMAS SAVERY'S STEAM ENGINE. 



The principle involved is that of the expansion of steam exerting a propulsive 

 force and its subsequent condensation to produce a vacuum. These are the princi- 

 ples employed in the modern steam engine, but the only use to which they were put 

 in Savery's engine was the elevation of water by suction. 



