When hydro was still king: In 1860s there was one waterwheel per 1000 inhabitants of Prussia.
RT @70sBachchan: 12/ Mike Davis was peerless. Ecology, Empire & Economy all held in a single unified field unlike those
RT @70sBachchan: 12/ Mike Davis was peerless. Ecology, Empire & Economy all held in a single unified field unlike those who plough their si…