Why bellows beat a squad of puffing slaves
Explore the 5,000-year evolution of the bellows, from ancient slave-powered tubes to the Han Dynasty's double-action piston. Discover how this simple invention fuelled civilisation's metal age.
Explore the 5,000-year evolution of the bellows, from ancient slave-powered tubes to the Han Dynasty's double-action piston. Discover how this simple invention fuelled civilisation's metal age.