Oliver Evans' Non-condensing High Pressure Stationary Steam Engine
In 1803, visitors to Evans' Philadelphia workshop were witness to a non-condensing high pressure steam-powered engine.
The stationary engine that could drive 12 saws through a hundred feet of marble in a 12 hour period. Unlike the low-pressure steam engines of the day, Evans's machine was portable. A portable engine could power a wagon to transport 100 barrels of flour from Lancaster to Philadelphia in two days instead of three, tripling profits.