1. Steam Engine
... was not the first person to be fascinated by boiling water and by the steam that came from the spout of a kettle. People had watched this happen for centuries, and occasionally some had tried to put this steam to use. Hero of Alexandria, a Greek scientist, had made a little steam engine in about the 1st century A.D. But at that time, there was nothing for the ... engine to do. There was so much slave labor that there was little use for laborsaving machinery. Hero's invention ... of the piston forced it down into the vacuum. When the piston reached the bottom of the cylinder, weights at...
- Word Count: 375
- Approx Pages: 2
- Grade Level: High School