Plot: How do space shuttle landings start with the vacuum which was forbidden by the Church? Burke takes us on an adventure with barometers, weather forecasting, muddy and blacktop roads, rain runoff, sewage, a cholera epidemic, hygiene, plumbing, ceramics, vacuum pumps, compressed-air drills, tunnels in the Alps, train air brakes, hydroelectric power, the electric motor, Galvani's muscle-electricity connection, Volta's battery, and gyroscopes.