Perpetual Notion
Inventor John Keely insisted that his “hydro-pneumatic-pulsating-vacu-engine” could drive a 30-car train 75 miles in 75 minutes using only a quart of water.
When he died in 1898, investigators found a three-ton sphere of compressed air in his basement, which drove his prototypes via hidden air-pressure tubes.
Supporters still insist he was framed.
